The quarantine hospital (Lazaretto) is an abandoned stone building complex at the port’s southern part, in the area of Lazaretta. Built in 1834, on Weiler’s design, the Lazaretto was initially used as a quarantine space for visitors to the island in order to protect the native population from outbreaks of cholera and other infectious diseases. From the late 19th century and up until the early postwar years, Lazaretto first served as a prison and then as an asylum for the mentally ill. During the Cretan Revolution of 1866, it served as a shelter for Cretan refugees.