The Basilica di San Calimero is a church in Milan, northern Italy. Its name refers to Saint Calimerius (died 190 AD), an early bishop of the city. It dates from the 5th century but was almost completely rebuilt in 1882 by the architect Angelo Colla in an attempt to restore it to the 'original' medieval structure.
What remains of the ancient church include: the 16th century crypt, with a noble frescoed vault by the Fiammenghini; a small fresco with the Madonna and Two Female Saints (15th century, attributed to Cristoforo Moretti) in the apse; a Crucifixion by Il Cerano, and a noteworthy Nativity by Marco d'Oggiono. Other medieval frescoes are in the annexed sacristy.
The crypt also houses Calimerius' relics and a pit located in the same place in which the former's bones were found in the water.
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.