San Tomaso in Terramara is a Neoclassical architecture, Roman Catholic church in Milan. Construction at the site began in the 11th century; the present structure with an imposing facade designed by Gerolamo Arganini was completed in 1827. The earliest records of the church are from the 11th century. There are various explanations as to the origin of the name Terramara, the most probable being that it derives from Terra Amara (bitter earth) or Terra Mala (bad earth), in memory of those who survived the 11th century barbaric invasions. By order of Carlo Borromeo, the church was rebuilt in 1576.