Zadar, (Italian Zara). Port and resort in Croatia, W Yugoslavia; population (1981) 116,000. It was alternately held and lost by the Venetian republic from the 12th century until its seizure by Austria 1813. It was the capital of Dalmatia 1815-1918 and part of Italy from 1920 until 1947, when it became part of Yugoslavia. The city was sacked by the army of the Fourth Crusade 1202, which led to the Crusade being excommunicated by Pope Innocent III.