Saint Mary's Cathedral in Lugo was erected in the early 12th century in a Romanesque style, with Gothic, Baroque and Neoclassicist elements.
A church existed in the site from 755. In 1129 Bishop Peter III commissioned a new edifice in the latest architectural style from Raimundo, a local architect and builder. This Romanesque structure was completed in 1273.
Later renovations and restorations added elements in other styles, such as the Renaissance retablo at the high altar. It was destroyed in the 1755 Lisbon earthquake and fragments of it are housed in the church.
The cathedral has a Latin Cross structure, with a length of 85 m. It has a nave, covered by a barrel vault, and two aisles, with an ambulatory and five apse chapels. The triforium features triple ogival mullioned windows. The apse houses a calvary sculpture from an unknown date.
The façade is a Renaissance design by Julián Sánchez Bort inspired by a plan proposed by Ventura Rodríguez for the Cathedral of Pamplona. Its construction was finished in the late 19th century, with the completion of the two side towers.
The northern entrance's narthex is in Gothic style, dating to 1510-1530. Internally showing a starred vault, it is formed by three archivolts with a lintel showing Christ Pantocrator and with a pinjante (glove-shaped decorative pendant) that features a depiction of the Last Supper.
To the right of the entrance is the Gothic Torre Vella (bell tower), surmounted by a Renaissance top floor finished by Gaspar de Arce in 1580. The sacristy (1678) and the cloister (1714) are in the Baroque style, as is the central chapel of the triforium (1726). The chapel of St. Froilán is in Renaissance style, dating to the 17th century. Notable is the choir, built by Francisco de Moure (early 17th century).
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.