Chora is the capital of Amorgos. It was founded in the early Byzantine period and developed after the 8th century AD when the population had to move to the interior of the island because of the Saracen raids .
Chora has developed around a high, narrow rock on top of which is the castle.
The castle was built in the beginning of the 13th century by the Venetian lords of the island.
Amorgos like the rest of Cyclades became part of the Duchy of Naxos of the Venetian Marco Sanudo. Sanudo granted as a fief Amorgos to brothers Andrea & Geremiah Ghizi. The Ghizi built the castle soon after they got the island.