Santa Maria della Catena church was built in 1490-1520 and designed by Matteo Carnilivari. The name derives from the presence, on one of the walls, of a chain (catena) which closed the Cala port.
The work mixes late Renaissance style and Gothic-Catalan style, the latter especially visible in the three-part arcaded loggia located at the top of a staircase (added in 1845). The interior is also late Gothic, and includes a canvas of Nativity with Adoration of the Shepherds (17th century) by an unknown master, and 16th-century bas-reliefs attributed to Vincenzo and Antonello Gagini, who also sculpted the capitals of the columns and the entrance portals.
Annexed to the church is a 1602 convent house, which, starting from 1844, has been the seat of the State Archive.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.