The Arco delle Due Porte or Arch of Two Doors is one of the remaining portals in the 11th century walls of Siena.
[1] It was the entrance into the southwesternmost end of Via Stalloreggi in Siena, region of Tuscany, Italy.
Pian dei Mantellini lead to the church and convent del Carmine.
A tabernacle facing the piazza, to the left of the walled-up arch, now shelters behind glass the remains of a Madonna and Child, attributed to either Duccio or one of his followers.
The fragment was part of a larger fresco that once included patron saints of Siena.