Roman CatholicThe oldest church in Madrid, it was already established in 1202 and serves Italian residents. The 12th century Mudéjar tower is thought to have originally been the minaret of a mosque, later consecrated as a Catholic church. Restored in 1805 it was given to the religious Order of the Servites in 1825. The church was named a national monument in 1931. The church has a relief of San Nicolas. The street and plaza have decorative tiles naming San Nicolas.