San Lorenzo in Damaso is a parish and titular church in central Rome. It is incorporated into the papal Palazzo della Cancelleria. Archaeological evidence suggests the site, like those of many churches in Rome, may have formerly housed a pagan temple. The first documentary evidence of a church at this site dates from AD 499. According to tradition, in the AD 380s a basilica church was erected by Pope Damasus I in his own residence.
The original basilica was demolished by Cardinal Raffaele Riario, a nephew of Pope Sixtus IV who commissioned the imposing Renaissance-style Palazzo della Cancelleria (1489–1513). The palace was built of spolia and stone from nearby ancient Roman buildings, including the Colosseum, and enveloped the new basilica of San Lorenzo in Damaso under the right wing.
The interior decoration was begun by commissions of the resident of the Palace, Cardinal Alessandro Farnese, in the late 16th century. Cavaliere d'Arpino painted the walls of the right counter-facade. The main altar hosts the painting of Saints and Coronation of St. Mary by Federico Zuccari. Below the altar are the relics of Pope St. Eutychian and Pope St. Damasus I.
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.