Astypalea Sights & Monuments - The Castle of Guerini in Astypalea, Greece is a renowned landmark situated atop a hill in the main town. Also known as the Venetian Castle, it boasts sturdy walls that have withstood the test of time. The castle was built by Italian noble John Guerini, who took control of Astypalea after the Crusaders' siege of Constantinople in 1204, with the aim of shielding the town from pirate attacks. While the interior construction has deteriorated, visitors can explore the stunning church of Panagia Kastriani, Agios Georgios church, and the Saray Tower within the castle walls. Enjoy a panoramic view of Astypalea from the castle grounds.

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