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UNESCO-listed Medieval City of Rhodes · immediately north-west of the Palace of the Grand Master, within the Kastello

The Bastion of the Palace of the Grand Master

A compact, earthfilled Hospitaller artillery bastion of some 50 × 70 m, recorded in the Order’s own archives as the ‘boulevard Beauregard’ — ‘Bastion of the great view’ — built around the surviving corner tower of an earlier Byzantine ‘Acropolis’ that a working, actively investigated hypothesis associates with the possible site of the Colossus of Rhodes.

Coat of arms of the Order of St John (Hospitaller cross)

“…since this bastion was entirely compact, filled with earth up to the battlements, with a field or recreation garden arranged on top, the stone missiles of the artillery… did not inflict the smallest amount of damage to the wall, while many ended up stuck inside.” Merri Dupui, eyewitness account of the siege of Rhodes, 1480 (transcribed in A. de Vertot, Histoire des Chevaliers Hospitaliers de St. Jean de Jérusalem…, vol. 2, Paris, 1726)

Exceptional High Moderate
00
Identity

Site & dates

Within the Kastello complex › immediately north-west of the Palace of the Grand Master

Stands immediately north-west of the Palace of the Grand Master, within the fortified complex the Hospitallers themselves called the “Kastello,” at the northern tip of the Collachium. Recorded in the Order’s own archives as the “boulevard Beauregard” — an allusion to its commanding outlook over Mandraki harbour and the Asia Minor coastline — the bastion is separated from the Palace only by a 7 m-wide remnant of the Palace’s own older moat, which still bisects the site from west to east. Protected under Greek Archaeological Law 3028/2002 as a component of the UNESCO-inscribed Medieval City of Rhodes, it is today an open-air venue for cultural events, receptions and educational programmes, administered as part of the Palace of the Grand Master/Archaeological Museum complex.

7th c. AD (approx.)–1309
A Byzantine fortified “Acropolis” occupies the site, its corner tower the bastion’s oldest surviving masonry core — possibly, on an actively investigated but unconfirmed hypothesis, the site of the Colossus of Rhodes.
1309/1382–1522
Hospitaller earthfilled bastion phase: the 14th-century Gate of the Master Builder, Fluvian’s earliest spur-shaped bastion, post-1444 rebuilding under Orsini and d’Aubusson, and d’Aubusson’s vaulted cannon emplacement after 1480.
1480
The bastion’s earthfilled construction absorbs the Ottoman siege’s artillery fire without damage, per the eyewitness Merri Dupui, in the Order’s first, victorious defence of Rhodes.
1522–1912
Ottoman-period fortification; the bastion’s north-east corner is rebuilt following damage, dated by an in-situ inscription to shortly after February 1615 and credited to the fortifications official Hasan Agha.
1889–1926
A neoclassical “military hospital of the poor” occupies the bastion’s platform, serving as Rhodes’ first modern hospital before its demolition as part of works to reclaim the bastion and the Grand Master’s garden.
2000–2015
A Ministry of Culture restoration programme, including geotechnical investigation (2001–2002) and phased structural works, reconstructs the collapsed east side; the bastion reopens to the public in September 2015.
May 2017
The restoration-enhancement project is awarded the European Union Prize for Cultural Heritage / Europa Nostra Award, the jury citing new evidence on the Colossus of Rhodes, the Byzantine Acropolis, and the Palace’s lost north wing.
01
Defence

Boulevard Beauregard — the bastion of the great view

1309–1522 › from the Gate of the Master Builder to d’Aubusson’s cannon emplacement

The bastion’s Hospitaller-period development traces the Order’s successive Grand Masters across nearly two centuries, transforming an early gate-fort into a major gunpowder-age artillery work. Its strategic value was decisively proven in 1480: filled with earth to the battlements and planted as a recreation garden, its mass simply absorbed the Ottoman army’s cannon fire, denying the besiegers the ability to unite their left and central wings against the town.

Before 1444, Antonio Fluvian (1421–1437)
Probably secures the Gate of the Master Builder by constructing the earliest “spur-shaped” bastion (“en éperon”) at this location — the earliest such arrangement identified at the site.
Post-1444, Orsini & d’Aubusson
Extensive rebuilding in the area of the “walls of the Tarsana”: the moat’s counterscarp (dated by Orsini’s coat of arms) and the layout of access to the portico of the battery.
After 1480, Pierre d’Aubusson (1476–1503)
Adds the vaulted, roofed cannon emplacement along the east side — opening square cannon embrasures in a previously backfilled curtain wall — and radically rearranges the north and west sides with raised emplacements and strong parapets.
After 1480, the Middle Tower-Staircase
A spiral staircase bearing d’Aubusson’s coat of arms links the Palace’s north wing to a raised space; the backfilling of the median moat and abolition of the “belvedere’s” arched openings attest an attempt to connect the Grand Master’s chambers with the garden.
A naming puzzle: the “Bastion of Auvergne”
Colonel Rottiers (1820s) records being shown “the bastion of Auvergne” as the key fort of the 1480 siege — but this project’s separate Statement for the Bastion of St George identifies a different fortification by the same name in the literature; the overlap is flagged here, not resolved.
02
Fabric

A Byzantine core within a Hospitaller earthwork

50 × 70 m › the Acropolis tower, the battery, and the Grand Master’s garden

The bastion’s core is far older than its familiar Hospitaller earthworks. At its north-east corner, the massive masonry of a Byzantine “Acropolis” corner tower — on a working, actively investigated hypothesis, possibly the site of the Colossus of Rhodes — anchors a compact, earthfilled fort of some 50 × 70 m whose final medieval form, under Grand Master Pierre d’Aubusson, raised the artillery platform some 15 m above the surrounding moat.

The Byzantine Acropolis core
The bastion’s north-east corner incorporates the robust corner tower of a 7th-century Byzantine “Acropolis” — the same fortified ground that formed the nucleus of the later Hospitaller Collachium.
The tower of the battery
An elegant early tower-bastion at the north-east corner, originally compact to battlement level; the base of its cylindrical turret, preserved in situ, was reconstructed by the Italians in the early 20th century as a watchtower.
D’Aubusson’s cannon emplacement
A vaulted, roofed battery along the east side, visible in Caoursin’s own depictions and probably built to improve lateral coverage of the fortress of St Nicholas after its 1467 completion.
The Grand Master’s Garden
At the bastion’s upper level, a historic garden known from a 1520 drawing and travellers’ descriptions; restoration proposals (as of the 2006 source) weigh reconstructing the Italian-period layout against a Renaissance-garden redesign drawing on the 1520 depiction.
Materials & technique
Coursed masonry built to the emplekton system, with poros-stone infill bound in lime-cement mortar; the 2011–2015 restoration reconstructed the collapsed east side using new stone from Archangelos and Crete, some 300 m³ of new carved masonry in total.
03
History

Six Grand Masters, a Byzantine antecedent, and a modern restoration

1421–2017 › from Fluvian’s spur bastion to the Europa Nostra Award

The bastion’s documented history runs from an early Byzantine stronghold through two centuries of Hospitaller rebuilding to a modern restoration whose archaeological research produced internationally recognised new evidence on several distinct periods of Rhodes’ history.

Antonio Fluvian, Grand Master 1421–1437
Probably built the earliest spur-shaped bastion protecting the Gate of the Master Builder, before 1444.
Giovanni Battista degli Orsini, Grand Master 1467–1476
Arranged the counterscarp of the moat, dated by his own coat of arms, in the post-1444 rebuilding of the “walls of the Tarsana.”
Pierre d’Aubusson, Grand Master 1476–1503
Added the vaulted cannon emplacement and portico of the battery after 1480; built the middle tower-staircase linking the Palace to the garden.
Hasan Agha, Ottoman fortifications official (“disdar”)
Credited, by an in-situ inscription, with rebuilding the bastion’s north-east corner shortly after February 1615.
Katerina Manousou-Ntella & Dimitra Kotlida, Architects
Directed the bastion’s 2011–2015 restoration and its archaeological research, cited by the 2017 Europa Nostra jury for new evidence on the Colossus of Rhodes, the Byzantine Acropolis, and the Palace’s lost north wing.
04
Testimony

Three witnesses across five centuries

1480–2017 › a siege survivor, a traveller’s memoir, and a conservation jury

Three pieces of direct testimony, from three different centuries, anchor this account of the bastion as a working fortification and, later, a celebrated conservation project — rather than an assumed one.

An eyewitness of the siege, 1480

“…since this bastion was entirely compact, filled with earth up to the battlements, with a field or recreation garden arranged on top, the stone missiles of the artillery, albeit enormous and fired with force, did not inflict the smallest amount of damage to the wall, while many ended up stuck inside” — leading the Ottoman commander to move his cannons and attack the town wall elsewhere.

Merri Dupui, Relation du siège de Rhodes en 1480, in A. de Vertot, Histoire des Chevaliers Hospitaliers de St. Jean de Jérusalem…, vol. 2, 598–616 (Paris, 1726).
A traveller’s memoir, 1820s

“…the bastion of Auvergne, which protected this side of the Palace, as the most important fort that obstructed the unification of the left wing of the Ottoman army with their central wing during the siege in 1480…” On leaving the garden within it, the visitor records being “impressed by the beauty of two ancient torsos, which were once used for the decoration of a fountain.”

Colonel C. Rottiers, Description des monuments de Rhodes (Brussels, 1828; the 2017 source dates the visit itself to 1825) — this document flags, without resolving, the minor date discrepancy between the two.
A conservation jury, May 2017

“The comprehensive preliminary research of the Bastion produced important new evidence and has enriched our knowledge on several periods in Rhodes’ history… The careful archaeological research and documentation efforts have effectively recovered much that had been lost of this prominent cultural heritage site, the focal point of the Medieval Town of Rhodes.”

Jury citation, European Union Prize for Cultural Heritage / Europa Nostra Award, awarded to the bastion’s 2011–2015 restoration-enhancement project, May 2017.
05
Narrative

The Bastion of the Great View

Told in the bastion’s own voice › from Byzantine watchtower to the Grand Master’s private garden

The Guardian

I am older than almost anything else you will meet in this story, and for a very long time, I was not a bastion at all. I was simply a tower — a thick, round, stubborn Byzantine watchtower, standing on the highest corner of an ancient fortress by the sea, thirteen hundred years ago and more. Centuries later, new people arrived on Rhodes: the Knights of Saint John, warrior-monks building themselves a walled town. They did not tear me down. Instead, they built around me, the way a tree grows new rings around its old core. First came a gateway beside me, cut through the old moat — the Gate of the Master Builder, people called it. Then Grand Master Antoni Fluvian, before the year 1444, wrapped a spur-shaped wall around that gate to protect it better, the earliest true fortification I ever wore.

Told in the bastion’s own voice, covering its Byzantine origin and Fluvian’s pre-1444 works; supplied by the user for this document, not drawn from the source docx.
The Battery

Then, in 1444, an army from Egypt attacked the town. The attack failed, but it frightened the Knights badly enough that two more Grand Masters, Orsini and then Pierre d’Aubusson, decided I needed to become something much bigger. They dug a proper moat around me. They raised thick new earthen walls. And d’Aubusson, planning for the cannons he knew were coming one day, built a long, roofed, vaulted chamber along my east side, with square openings for his own big guns to fire through — what everyone came to call simply the Battery. By then the Knights had a name for me: Boulevard Beauregard. “Bastion of the Great View.” I looked out over the whole of Mandraki harbour and the mountains of Asia Minor across the water, and everyone who built onto me made sure I kept that view.

Told in the bastion’s own voice, covering the 1444 Mamluk raid and Orsini’s and d’Aubusson’s enlargement of the bastion and its Battery; supplied by the user for this document, not drawn from the source docx.
The Secret of the Soft Wall

In 1480, the test came. A huge Ottoman army surrounded Rhodes, and their cannons — enormous ones, built to smash castles to rubble — were turned on me along with everything else. A soldier who was there, a man named Merri Dupui, wrote down exactly what happened, and it is my favourite sentence in this whole story: the stone balls came in “enormous and fired with force,” he wrote, and yet they “did not inflict the smallest amount of damage to the wall, while many ended up stuck inside.”

Here is my secret, the one the enemy gunners did not understand until it was too late. I was not built like a thin, hard eggshell that a strong enough punch could crack. I was built fat and soft all the way through — packed solid with earth, right up to the very top, with a garden growing on top of me as though I were nothing more than a big, friendly hill. A cannonball does not shatter a hill. It just sinks in and stops, the way your fist sinks into a cushion instead of breaking it. One by one, the enemy’s cannonballs buried themselves inside me and went nowhere at all — until the frustrated Ottoman commander finally gave up on me completely and marched his cannons off to try his luck somewhere else. Being soft had made me unbreakable.

Told in the bastion’s own voice, covering the siege of 1480; the Dupui quotation is the same eyewitness testimony already given directly, in the source’s own translation, as the first witness block in Testimony (04), above — retold here in the bastion’s own words rather than duplicated as a second independent source. Supplied by the user for this document.
The Grand Master’s Secret Garden

After that victory, d’Aubusson did something I did not expect from the builder of a fortress: he gave me a garden. He built a spiral staircase, carved with his own coat of arms, running straight down from his private rooms in the Palace to the top of me, so that the Grand Master of the whole Order could step out of his bedroom and walk directly into his own private garden — without ever leaving the safety of his walls. A drawing from the year 1520 still survives showing what grew up there: fountains, orange trees, climbing vines on arched metal frames, and, tucked into one corner, a vaulted aviary full of peacocks, ostriches, and rabbits. I was, by then, both a weapon and a palace garden at exactly the same time, and I am still proud of that combination.

Told in the bastion’s own voice, covering d’Aubusson’s post-1480 garden and the surviving 1520 drawing of its plantings; supplied by the user for this document, not drawn from the source docx.
06
Gallery

Photo gallery

Six views › the Palace and bastion in their setting, the restored battery, present-day use, and two historical siege views

07
Assessment

Significance criteria

Nine-criteria framework › International importance, Europa Nostra Award-winning conservation

Rarity
A rare, and in this project’s documented monuments unique, combination of a Byzantine “Acropolis” corner tower — possibly, on an actively investigated hypothesis, the site of the Colossus of Rhodes — with a fully developed Hospitaller earthfilled artillery bastion and its own historic garden, directly abutting the Order’s seat of government.
Exceptional
Representativeness
Exceptionally representative of the Hospitaller Order’s layered building practice at Rhodes: an earlier Byzantine defensive core, the phased transformation of a medieval gate into a gunpowder-age battery under successive Grand Masters, and the deliberate integration of a residential garden into a working fortification.
Exceptional
Aesthetic value
The bastion’s own archival name — “boulevard Beauregard,” “Bastion of the great view” — directly names its aesthetic significance: a commanding outlook over Mandraki harbour and the Asia Minor coastline, combined with its historic garden and massive fortified profile beside the Palace.
Exceptional
Integrity
The core defensive fabric and Byzantine tower retain real authenticity, but the present form results from extensive 20th-century Italian reconstruction, an undated 20th-century structural collapse of the east side, and a thorough 2011–2015 restoration; the historic garden itself remains at the proposal stage rather than restored to a settled design.
Moderate
Historical value
Spans the Byzantine Acropolis phase, the Hospitaller Gate of the Master Builder and its successive Grand Masters’ rebuildings, a documented decisive role in the victorious 1480 siege, Ottoman-period rebuilding, and a modern restoration producing internationally recognised new evidence.
Exceptional
Symbolic, spiritual & social value
As the site of the Grand Master’s own recreation garden and today a venue for cultural events under the theme “Violence and Tolerance,” the bastion carries strong, continuing social value bridging its military and domestic functions.
High
Scientific value
The 2011–2015 restoration was accompanied by an unusually productive programme of archaeological and geotechnical research, producing significant new evidence — as recognised by the 2017 Europa Nostra jury — on the Colossus of Rhodes, the Byzantine Acropolis, and the Palace’s lost north wing.
Exceptional
Interpretive potential
A single, publicly accessible monument already fitted with an information panel and multimedia touring programme, through which visitors can trace the site’s transformation from Byzantine acropolis to Hospitaller garden-bastion.
Exceptional
Importance level
An integral component, alongside the Palace itself, of the Outstanding Universal Value of the UNESCO-inscribed Medieval City of Rhodes (criteria ii, iv, v), and an internationally recognised model of conservation and archaeological research practice through its 2017 Europa Nostra Award.
International

Statement of significance

“Boulevard Beauregard” (the Order’s own archival name for the bastion — not a Latin motto like other monuments in this project, but the French-language name itself — “Bastion of the great view,” an allusion to its outlook over Mandraki harbour and the Asia Minor coastline.)

The Bastion of the Palace of the Grand Master — recorded in the Order’s own archives as the “boulevard Beauregard,” “Bastion of the great view” — is a compact, earthfilled fort of some 50 × 70 m extending north-west of the Palace, incorporating at its core the robust corner tower of an earlier Byzantine “Acropolis” that a working, actively investigated hypothesis associates with the possible site of the Colossus of Rhodes. Its Hospitaller-period development traces the Order’s successive Grand Masters across nearly two centuries: an early Gate of the Master Builder, probably fortified with the earliest spur-shaped bastion at Rhodes under Antonio Fluvian before 1444; extensive rebuilding under Orsini and d’Aubusson after the 1444 siege; and, after 1480, d’Aubusson’s vaulted cannon emplacement and the tower-staircase connecting the Palace’s north wing to the famous Grand Master’s garden. The bastion’s earthfilled construction proved decisive in the victorious siege of 1480, when, per the eyewitness Merri Dupui, Ottoman artillery “did not inflict the smallest amount of damage to the wall.” Taken together, this history gives the bastion a monument of International importance: an integral component, alongside the Palace itself, of the Outstanding Universal Value of the UNESCO-inscribed Medieval City of Rhodes under criteria (ii), (iv) and (v), and an internationally recognised model of documented modern conservation and archaeological research practice through its 2017 Europa Nostra Award.

National

Component of the UNESCO-inscribed Medieval City of Rhodes, protected under Greek Archaeological Law 3028/2002 and the 1948 Ministerial Decision (ΥΑ 23084/737, ΦΕΚ 10/1948) declaring the Medieval Town’s monuments.

UNESCO

Medieval City of Rhodes (ref. 493), inscribed 1988, criteria (ii), (iv) and (v). An integral part of the Palace of the Grand Master component, cited in the property’s Statement of Outstanding Universal Value.

Award

European Union Prize for Cultural Heritage / Europa Nostra Award, May 2017, for the 2011–2015 restoration-enhancement project — an international, non-statutory recognition separate from the bastion’s statutory designations.

References

  1. Bibliothèque nationale de France, Département des Manuscrits, MS Latin 6067 (Guillaume Caoursin, chronicle of the 1480 siege). gallica.bnf.fr — source of the besieged-Rhodes miniature reproduced in the Gallery (06).
  2. de Vaivre, J. B. “Autour du grand siège de 1480. Descriptions de Rhodes à la fin du XVe siècle.” Société de l’histoire et du patrimoine de l’ordre de Malte, Bulletin 22 (2009): 61.
  3. Dupui, Merri. Relation du siège de Rhodes en 1480. In A. de Vertot, Histoire des Chevaliers Hospitaliers de St. Jean de Jérusalem, appelés depuis les Chevaliers de Rhodes et aujourd’hui Chevaliers de Malte, vol. 2, 598–616. Paris, 1726.
  4. Gabriel, A. La cité de Rhodes: Topographie–Architecture militaire, vol. I. Paris, 1921.
  5. Hellenic Government Gazette (ΦΕΚ). Ministerial Decision 23084/737 (25 August 1948), ΦΕΚ 10 (23 September 1948); Law 3028/2002 on the Protection of Antiquities and Cultural Heritage in General.
  6. ICOMOS Australia. The Burra Charter: The Australia ICOMOS Charter for Places of Cultural Significance. Burwood: ICOMOS Australia, 2013.
  7. ICOMOS. ICOMOS Charter for the Interpretation and Presentation of Cultural Heritage Sites. Paris: ICOMOS, 2008.
  8. Manousou-Ntella, Katerina, and Dimitra Kotlida. “The Bastion of the Palace of the Grand Master: Restoration of the Portico of the Battery and the Upper Platform of the Cannon Emplacement.” In Medieval Town of Rhodes: Restoration Works 2011–2016, 81–93. Rhodes: Ministry of Culture and Sports / Scientific Committee for the Monuments of the Medieval Town of Rhodes, Kasseris Publications, 2017. The principal source for this document, read in full.
  9. Manousou-Ntella, Katerina. “The Bastion of the Palace of the Grand Master” (in Greek). In Medieval Town of Rhodes: Restoration Works 2000–2008, 161–187. Rhodes: Ministry of Culture, 2008.
  10. Manousou-Ntella, Katerina. «Η μνημειακή ζώνη των οχυρώσεων της πόλης της Ρόδου προς το μικρό λιμένα —‘Μανδράκι’— και ο προμαχώνας του παλατíου του Μεγάλου Μαγίστρου.» 1st Panhellenic Conference on Restorations, Thessaloniki, 14–17 June 2006.
  11. Pitilakis, Kyriazis, with P. Apostolidis, M. Mannakou, and V. Terzi. Study of Restoration of the Bastion of the Palace of the Grand Master. Aristotle University of Thessaloniki, Department of Geotechnical Engineering, in cooperation with the Public Works Laboratory of YPECHODE. Thessaloniki, March 2005.
  12. REBOOT Statement of Significance for the Palace of the Grand Master (this project), which already carries a substantial “Bastion” section consulted and consolidated into this monument’s own dedicated Statement.
  13. Rottiers, Colonel C. Description des monuments de Rhodes. Brussels, 1828.
  14. UNESCO World Heritage Centre. “Medieval City of Rhodes.” World Heritage List, ref. 493. Inscribed 1988.
  15. Waldstein-Wartenberg, Berthold. Annales de l’ordre souverain militaire de Malte, Juillet–Décembre 1977, Année XXXVE, no. III–IV (trans. Ioannis El. Volanakis, Rhodes, 1991): 63.
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