The Fortezza (fortress) is the citadel of the city of Rethymno in Crete. It is built on a hill which was the site of ancient Rhithymna's acropolis. Between the 10th and 13th centuries, the Byzantines established a fortified settlement to the east of the hill. It was called Castrum Rethemi, and it had square towers and two gates. The fortifications were repaired in the beginning of the 13th century.
Following the fall of Cyprus to the Ottomans in 1571, Crete became the largest remaining Venetian overseas possession. Since Rethymno had been sacked, it was decided that new fortifications needed to be built to protect the city and its harbour. The new fortress, which was built on the Paleokastro hill, was designed by the military engineer Sforza Pallavicini according to the Italian bastioned system.
Construction began on 13 September 1573, and it was complete by 1580. Although the original plan had been to demolish the old fortifications of Rethymno and move the inhabitants into the Fortezza, it was too small to house the entire city. The walls along the landward approach to the city were left intact, and the Fortezza became a citadel housing the Venetian administration of the city. It was only to be used by the inhabitants of the city in the case of an Ottoman invasion.
On 29 September 1646, during the Fifth Ottoman–Venetian War, an Ottoman force besieged Rethymno, and the city's population took refuge in the Fortezza. Conditions within the citadel deteriorated, due to disease and a lack of food and ammunition. The Venetians surrendered under favourable terms on 13 November.
The Ottomans did not make any major changes to the Fortezza, except the construction of a ravelin outside the main gate. They also built some houses for the garrison and the city's administration, and they converted the cathedral into a mosque. The fort remained in use until the early 20th century.
Large-scale restoration work has been under way since the early 1990s. The Fortezza is managed by the Ministry of Culture and Sports, and it is open to the public. The Ottoman ravelin now houses the Archaeological Museum of Rethymno.
References:Doune Castle was originally built in the thirteenth century, then probably damaged in the Scottish Wars of Independence, before being rebuilt in its present form in the late 14th century by Robert Stewart, Duke of Albany (c. 1340–1420), the son of King Robert II of Scots, and Regent of Scotland from 1388 until his death. Duke Robert"s stronghold has survived relatively unchanged and complete, and the whole castle was traditionally thought of as the result of a single period of construction at this time. The castle passed to the crown in 1425, when Albany"s son was executed, and was used as a royal hunting lodge and dower house.
In the later 16th century, Doune became the property of the Earls of Moray. The castle saw military action during the Wars of the Three Kingdoms and Glencairn"s rising in the mid-17th century, and during the Jacobite risings of the late 17th century and 18th century.