Original sentence: Fortezza Castle is a museum and castle in Rethymno, Greece
Edited sentence: Construction began on 13 September 1573.During Ottoman times, most of the space inside the fortress was settled, and the last houses were demolished only in the 1960s.In the aftermath of the fall of Cyprus to the Ottoman Empire in 1571, the Venetians began fortifying Crete, their largest remaining overseas possession.Large-scale restoration work is under way since the early 1990s.The Fortezza Castle (, from , "fortress") is the Venetian-era citadel of the city of Rethymno in Crete, Greece.The fortress was conquered by the Ottomans in 1646, and remained in use until the early 20th century