The Real Alcázar of Seville is a walled palace complex built in different historical stages.

Although the original palace was built in the High Middle Ages, some vestiges of Islamic art are preserved and, from the period after the Castilian conquest, a Mudejar palatial space and another in the Gothic style. In later reforms, Renaissance, Mannerist and Baroque elements were added.

It is the residence of the members of the Spanish Royal Family when they visit Seville. This makes it the oldest royal palace in use in Europe.

The plot where the Alcazar enclosure is framed was occupied since the 8th century BC. Remains of a Roman building from the 1st century have been found, of which its function is not known with certainty. This 1st century building extended from the Banderas courtyard to the interior of the current enclosure.

On the ruins of the Roman building, an early Christian church was built, identified by some as the Basilica of San Vicente, which was one of the three main temples of the city during the Visigoth era. Some remains of this primitive temple have been found in the Patio de Banderas.

Some capitals and shafts of this ancient temple were used in the construction of the palace of Pedro I.

The tombstone of Bishop Honorato, which was probably in this church, is currently in the Cathedral of Seville.