Mooring stones weighing 250–300 kilograms each were unearthed at the edge of a 5-meter long stone platform chiseled in Phoenician-style, thought to be an installation that helped raise military vessels from the water onto the shore. Under the citadel and prison of Acre, archaeological excavations revealed a complex of halls, which was built and used by the Hospitallers Knights. This complex was a part of the Hospitallers' citadel, which was combined in the northern wall of Acre. The complex includes six semi-joined halls, one recently excavated large hall, a dungeon, a dining room and remains of an ancient Gothic church. Medieval European remains include the Church of Saint George and adjacent houses at the Genovese Square (called Kikar ha-Genovezim or Kikar Genoa in Hebrew). There were also residential quarters and marketplaces run by merchants from Pisa and Amalfi in Crusader and medieval Acre. Acre is twinned with: Apart from those mentioned in the article (Alexander the Great, St Paul, Richard the Lionheart, Napoleon):  Acre is one of three main settings in the video game Assassin's Creed.