[1][2] Originally the site was a square called Piazza dei Cavalieri,[5] but during the British period Governor Gaspard Le Marchant enclosed the space to create a British-access only orchard.
[5][8] The northwest part of the square consists of a large building originally known as the Casa del Commun Tesoro.
The building housed the accounts, contracts and records of the treasury of the Order of Saint John.
[9] Over the years, La Casa del Comun Tesoro also housed government offices, a hotel and a cinema.
[10] The southeast side of the square, facing the Casa del Commun Tesoro, is the National Library of Malta, commonly known as the Bibliotheca.