San Sebastián de Soreasu, Church building in Azpeitia, Spain

San Sebastián de Soreasu is a church building in the town of Azpeitia, in Spain. Its exterior combines Gothic, Baroque and historicist features, while the interior holds three long halls and several side chapels with carved decorations.

The church is contemporary with that of Azkoitia. In 1534 Pedro Altzega was commissioned to rebuild it; work passed through several masters until Domingo Olozaga took charge in 1541, though he abandoned the Azpeitia commitment in 1545 after signing with Hernani. Delays led the town council on 7 October 1568 to decide to build a new church reusing part of the existing structure. The bishop of Pamplona approved it, and in 1570 Pedro and Martín de Armendia were chosen; the bishop's 1568 visit prompted the three-nave design with round columns.

The chapel of La Soledad, built in the 16th century, holds Renaissance wall paintings that were hidden under cover from the 19th century until restoration work brought them to light. According to researcher Miren de Miguel, the gold used in them came from Peru, brought by Nicolás Sáez de Elola, who had served with Francisco Pizarro and ordered the chapel built before his death.

The easiest way to approach is from the front courtyard, which has broad stone steps and a clear view of the main entrance. Inside, the level floor and wide central aisle make moving around the three halls comfortable for someone walking slowly.

The Chapel of Solitude (Bakardadearen Kapera) holds Renaissance wall paintings uncovered during restoration after being covered since the 19th century. According to researcher Miren de Miguel, the gold used there came from Peru, brought by Nicolás Sáez de Elola, who had been with Francisco Pizarro and ordered the chapel built before his death.