The Basilica of Santa Maria Maggiore di Siponto is a church in Manfredonia, Apulia. The church was completed around 1117, when it was consecrated (perhaps in place of a pre-existing 6th century Palaeo-Christian edifice) and the relics of Laurence of Siponto where put under the high altar.
The building has an unusual square plan, consisting of two independent churches (one, underground, is the current crypt), two apses on the southern and eastern walls, and a medieval monumental portal with two side lions, facing the road entering in Manfredonia.
The interior, with four pillars, dates to the 11th century, and once housed the icon of the Holy Virgin of Siponto, dated to the 7th century. The icon is now in the Manfredonia Cathedral, as well as the polychrome wood Byzantine statue of La Sipontina (6th century) The underground church dates to the early Middle Ages, and was replaced by the upper one after having been destroyed by an earthquake.
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.