Monastery of San Pedro de las Dueñas was built in the late 10th century and beginning of the 11th century. It is one of the most representative churches of Mudejar Romanesque in its Pre-classical period, began in stone and finished in brick (1087 and 1110) and Basilical ground plan.
Over the presbytery of the chancel stands a brick tower, it is square with progressively decreasing sections.There is an interesting collection of capitals. The most remarkable of them is the one known as 'de las siete monjas' (the seven nuns capital) and the chancel shows an interesting Christ by Gregorio Fernández.
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.