Monasterio de San Salvador in Cornellana is a monastery located in the municipality of Salas. Consisting of several Romanesque style buildings which started to be built in the 11th century, the monastery was founded by infanta Cristina Bermúdez, daughter of Bermudo II of León and his first wife Queen Velasquita Ramírez. She founded the monastery in 1024 after the death of her husband, infante Ordoño Ramírez 'the Blind', son of Ramiro III of León and his wife Sancha Gómez. Cristina lived in the monastery as a nun and was buried there.
After her death, the monastery was divided among her heirs, her sons and daughters; Alfonso, Aldonza, Ordoño, and Pelaya Ordóñez. A great-grandson of Cristina, the powerful Count Suero Vermúdez in 1120 donated the monastery to the Abbey of Cluny and then to the Cathedral of Oviedo.
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.