Located behind the Cathedral of San Sabino and the annex building of Trulla, the square is surrounded by buildings in typical local masonry.
Overlooking it, the building of the Diocesan Library of the Higher Institute of Religious Sciences Odegitria, recently restored and expanded with books donated by the Library of the Jesuits.
In the 90s during the restoration of Trulla remains of an ancient church of which you do not have documentation emerged: it is a building dating from around the tenth century. Inside, with three apses, the seat for the clergy and a floor made up of square and rectangular pieces of limestone forming a beautiful geometric warp.