The Basilica of St. Mary of the Altar of Heaven (Latin: Basilica Sanctae Mariae de Ara coeli in Capitolio, Italian: Basilica di Santa Maria in Ara coeli al Campidoglio) is a titular basilica in Rome, located on the highest summit of the Campidoglio. It is still the designated Church of the city council of Rome, which uses the ancient title of Senatus Populusque Romanus.