The Colegiata de Nuestra Señora de la Asunción was built in the sixteenth century in the town of Osuna. It was founded by Juan Téllez-Girón, 4th Count of Ureña.
The interior has a nave and two aisles, five chapels and a presbytery. The interior of the church has a rich Renaissance decoration. It has a beautiful Baroque main altar, made throughout the eighteenth century, and the chapels on the sides are all very attractive. In the interior, the huge sacristy is now a museum that exhibits a magnificent collection with five paintings by José de Ribera (El Españoleto) and a carving by Juan de Mesa.
There is a Pantheon of the Dukes on a lower level that was built in Plateresque style in 1545 and contains a small chapel with an altarpiece attributed to Roque Balduque, a paint of Hernando de Esturmio, and the tombs of the Dukes of Osuna.
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.