the remains of an ancient settlement in the Estonian SSR, located on the eastern outskirts of the city of Tallinn, at the bend of the Pirita River. The oldest traces of habitation at this site (fragments of corded-ware pottery) date from the first half of the second millennium B.C., while remains of a settlement of the Asva culture date from the seventh to fifth centuries B.C. and the remains of the fortified settlement, from the sixth to 11th centuries A.D. Excavations of 1936–38 and 1952–58 have revealed traces of the fortifications of the settlement, which were rebuilt three times after fires. Remains of dwellings, hearths, and other items were also unearthed.

Judging from the finds, the inhabitants of Iru engaged in stock raising, farming, seal hunting, and the working of metals. Adjoining the fortified settlement were the remains of an unfortified settlement dating from the end of the first millennium to the beginning of the second millennium A.D.