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:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.