Santa Maria Formosa was erected in 1492 under the design by Renaissance architect Mauro Codussi. It lies on the site of a former church dating from the 7th century, which, according to tradition, was one of the eight founded by San Magno, bishop of Oderzo. The name 'formosa' relates to an alleged appearance of the Holy Virgin disguised as a voluptuous woman.
The plan is on the Latin cross, with a nave and two aisles. The two façades were commissioned in 1542, the Renaissance-style one facing the channel, and 1604, the Baroque one facing the nearby square.
The artworks in the interior include the St. Barbara polyptych by Palma the Elder, one of his most celebrated works. The Conception Chapel houses a triptych of Madonna of Misericordia by Bartolomeo Vivarini (1473), while in the Oratory is the Madonna with Child and St. Dominic by Giambattista Tiepolo (18th century). There is also a Last Supper by Leandro Bassano.
The dome of the church was rebuilt in after falling during an earthquake in 1688.
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.