The Crusaders' Siege of Antioch conquered the city in 1098. At this time, the bulk of far eastern trade traveled through Egypt, but in the second half of the 12th century Nur ed-Din and later Saladin brought order to Muslim Syria, opening up long-distance trade routes, including to Antioch and on to its new port, St Symeon, which had replaced Seleucia Pieria. However, the Mongol conquests of the 13th century altered the main trade routes from the far east, as they encouraged merchants to take the overland route through Mongol territory to the Black Sea, reducing the prosperity of Antioch.