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 Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.