HAINBURG, a small town in Lower Austria, on the right bank of the Danube, a short distance above its confluence with the Morava. This is a significant site, commanding the passage of the Danube through the Porta Hungarica, between the Little Carpa thians and the Leitha mountains, with a record of continuous settlement since pre-Roman time. Numerous Roman remains exist in and near the town and a Roman aqueduct still conveys its water supply, while history supplies ample evidence of the strategic value of the site in a record of struggle between the west and invaders from the east, Magyars and Turks, both of whom held the town at different times. Much of its old impor tance has been lost to Bratislava and to-day Hainburg is chiefly important for its large manufacture of tobacco and the attrac tion of its antiquities. Pop. (1923) 7,500.