The Wignacourt Aqueduct is a 17th-century aqueduct in Malta, which was built by the Order of Saint John to carry water from springs in Dingli and Rabat to the newly-built capital city Valletta. The aqueduct was carried through underground pipes and over arched viaducts across depressions in the ground. The aqueduct remained in use until the 20th century. Most of its arches still survive today, and can still be seen in the localities of Attard, Balzan, Birkirkara, Fleur-de-Lys and Santa Venera.