The Arco delle Due Porte or Arch of Two Doors is one of the remaining portals in the 11th century . It has been variously called the Porta di Stalloreggi with the gates known as San Quirico, Santa Margherita, and the Arco di Santa Lucia. It was the entrance into the southwesternmost end of Via Stalloreggi in Siena, region of Tuscany, Italy. Outside of the portal, in the Piazetta dell Due Porte are a confluence of streets: Via Fosso di Sant'Ansano flows south, Via Paolo Mascagni flows west, and Pian dei Mantellini flows south. Via Mascagni leads down the slope some 200 meters to the 13th-century gate: . Pian dei Mantellini lead to the church and convent del Carmine.