Os Mártires is a former civil parish (freguesia) in the city and municipality of Lisbon. It was one of the oldest civil parishes of Lisbon, dated from 1147. Dedicated to the martyrs who participated in the 1147 reconquest of Lisbon from the Moors, this beautiful church was built after the 1755 earthquake on the site of another where the first baptism,after the reconquest, took place. It was completed in 1784 and is similar to two other Baroque churches nearby, the Church of Loreto and Encarnação. Inside is a marble altar and a beautifully-painted ceiling, as well as an organ that's considered one of the best in the country.