The Saint Sebastian Church is a 16th-century church in central Madrid. The name arises from a devotional chapel which was found along the route to the Basilica of Nuestra Señora de Atocha, founded in 1541. The first architect around 1550 was Antonio Sillero, who also finished the Chapel of the Sagrado Corazón. This church like that of San Luis conserved for years the rights of asylum for those escaping official persecution. More chapels and enlargements were added by Antonio de la Tijera, Juan de Bulga Valdelastras, and Juan de Obregón between 1595 and 1598. The tower was built in 1612 by Lucas Hernández.
During the Spanish Civil War, the church was sacked by Republican forces, before it ended up being almost destroyed during a bombing raid by the Nationalists around November 20, 1936. This caused many of the works to be transferred to other sites. The church was rebuilt in a different orientation by Francisco Íñiguez Almech between 1943 and 1959.
The Chapel of Our Lady of Bethlehem, known as the 'chapel of the architects', was built in 1693 with Francisco Moreno as director of the works, and remodeled by Ventura Rodríguez in 1766-1768. Both Ventura Rodríguez and Juan de Villanueva are buried here. The chapel is to the right of the entrance, protected by a crystal gate.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).