The Monastery of San Pedro de Eslonza is a former Benedictine monastery in Gradefes. Today in ruins, it was once the second most important monastery in the province, after the monastery of San Benito in Sahagún. It was founded in 912 by King García I of León, but was destroyed by the Moorish ruler Al-Mansur Ibn Abi Aamir in 988; it was therefore rebuilt in 1099 by the Urraca of Zamora, daughter of Ferdinand I of León and Castile. In 1109 she became queen of Galicia, León and Castile, and gave consistent donations to the monastery.
The edifice was in ruinous state in the 16th century, and was therefore restored with, among the other interventions, three new Renaissance portals. The main façade was added in Baroque style: its niches once housed statues of saints, now disappeared.
The monastery's prosperity suffered a severe blow in 1836 with the Ecclesiastical Confiscation of Mendizábal, by which it was sold and its artistic heritage split between numerous buyers. Its decline continued despite the fact that, in 1931, it was declared a national monument. In the period between 1944 and 1970 bishop Luis Almarcha Hernández moved its portals to the church of San Juan y San Pedro de Renueva, at León, saving them from destruction.
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.