The Cathedral of the Holy Cross and Saint Eulalia is the church of Barcelona's Archbishop. The site where the church stands was also the location of a Roman temple and subsequently, a mosque. The construction of the present church began in 1298 under King Jaume II and the main building was only completed in 1460. However, work continued on with the Gothic facade being completed in 1889. The design of the façade and spire were based on the plans by Carles Galters. The Gothic façade is adorned with statues and figures while the bell towers have Gothic pinnacles and the windows and doors have Gothic arches. The architecture has touches of Gothic, medieval and Renaissance styles.

The church is 93 m. long, 40 m. wide and 28 m. high in the central nave. The octagonal bell towers reach 54 m. from the ground and the central spire reaches a height of 70 m. Within the cathedral, there is one nave and behind the altar, there are 15th-century stained glass windows. Down the sides of the nave are 28 chapels with tombs of prominent figures in Barcelona history including Count Ramon Berenguer I. The crypt beneath the church altar holds the sarcophagus of Santa Eulalia, Barcelona's patron saint.

The organ was built in 1537-1539. It was restored between 1985-1994. Its cover was decorated by Pere Pau Serafí “el Grec”. Since 1990, the Cathedral has been offering monthly organ concerts with great success.

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