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Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City
Archaeological Sites . Museums . Cultural MonumentsHeraklion area

Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City

Fortress Rocca a Mare, landmark of Heraklion

The landmark of Heraklion Fortress Rocca a Mare was closed by the end of 2010 and almost 6 years of detailed and scientific restoration work began. The work included the consolidation and restoration of the monumental shell, replacement and upgrading of public service infrastructure and creation of multiple showrooms, exhibition areas and information sites as well as infrastructure for cultural activities.

Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City
The fortress guards for many centuries the entrance to the city

Jacques Yves Cousteau in the Fortress Rocca a Mare

For the first time one can visit in the evocative spaces of the Fortress Rocca a Mare the findings of shipwrecks underwater survey. These were carried out at Dia island by the legendary French researcher Jacques Yves Cousteau, in 1976, under the supervision and guidance of pioneering Greek marine archaeologists of the then Ministry of Culture and Science. The shipwrecks findings report was implemented in collaboration with the Department of Underwater Antiquities.

The name Koules

The Venetian fortress through the centuries had many names: during Venetian rule: Fortress Rocca a Mare or Castello a Mare or Castello, during Ottoman rule: Su Kulesi. The latter is kept in the daily language of the Cretans and transformed to Koules.

Koules is a so-called marine fortress

It is situated at the entrance to the Venetian harbor of Heraklion. It is one of the so-called marine fortresses which functioned as forward bastions on the sea within the framework of more general architectural planning. It was occasionally combined with protection of the commercial harbor and docks, as was the case here.

Glimpse into history

According to historical testimony, there was probably a tower at the same site during the second Byzantine or even the Arab period. We do not know what form the Fortress Rocca a Mare had during the first period of the Venetian rule. Early 16th c. Venetian documents mention that the tower had suffered damages and was practically in ruins. With the prevalence of the bastion system (fronte bastionato) and radical changes in the form of fortifications, the old fortress could not meet the new defensive needs created by the use of cannons, and so in 1523 it was decided to demolish it and build it over in accordance with the bastion system. Construction of the new fortress was completed around 1540.
It formed an inseparable part of the new Venetian fortifications of the city. The fortress’s main axis was oriented towards the East to protect the harbor and the east coast, while its north-northwestern side controlled the Bay of Candia, the coastal wall, and the Cretan sea.

Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City
Inside the walls
Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City
One of the exhibition halls

Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City
Marvelous views from the upper floor

The building

The Fortress Rocca a Mare is built atop a natural rocky outcrop, which the Venetians were compelled to supplement by sinking old galleons filled with rocks, gravel and boulders transported from Fraskia and the island Dia.

The fortress has two storeys, and in its final form covered a total area of around 3,600 square meters.
On the ground floor, which was vaulted with openings for ventilation and lighting ending at the dome, there were 26 separate rooms used as storerooms for food and munitions, a meeting hall, and a prison. The water reservoir was also on the ground floor.

Access to the upper storey was achieved by a staircase and a ramp used for moving firearms. There are projections on the walls that probably supported a wooden mezzanine floor to provide troop quarters. The upper floor is configured in two levels; it provided accommodations for the governor (castellano) and officers of the garrison, a bakery, a mill, a small church and a lighthouse.

On three sides of the sea openings in the wall housed the cannons that protected the harbor. In 1630 there were 18 cannons on the ground floor and 25 on the first floor.

Venetian Fortress Rocca a Mare (Koules)- Landmark of Heraklion City
The Winged Lion of Saint Mark at the northern walls of Koules

The winged Lion of Saint Mark

Three marble compositions with the Winged Lion, the symbol of Saint Mark (Venice’s patron saint) were built into the facades of Koules. The first is set above the main gate on the western side of the fortress. At its base is an inscription with the name of the Doge Andrea Gritti (1533-1534). The second is above the northern gate; at its base is an inscription bearing the names of the Doge Andrea Gritti, the Duke of Crete Domenico Capello, the Capitano Generale Gerolamo Zane, and the councillors (consiglieri) Marcantonio Diedoand Nicolo Marcello (1533). The third composition on the fortress’s southern facade is simpler.

During the Ottoman period

the fortress underwent repairs and interventions, chiefly to its upper storey, where battlements, gun ports, and a small mosque were added. Many Cretan revolutionaries were imprisoned in the fortress’s cells, Daskalogiannis among them.
The fortress has been repeatedly repaired due to the great force of the sea, which continues today to cause damage to its masonry and foundations.

(Text source: Archaeological Receipts Fund & Naftemporiki)

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Useful Information

(last updated May 2020)

 Yes. Photography without flashlight is partially allowed inside the museum.

Opening hours: during all the year daily from 08:00 until 15:00 hrs, last entrance at 14:15 hrs

Entrance fee: 4€ / reduced ticket 2€.

Amenities for the physically challenged: Accesses to the ground floor and the terrace. WC available.

Tel. at the monument: 0030 2810 243559


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