Arta ) is a city with a rich history in northwestern Greece, capital of the peripheral unit of Arta, which is part of Epirus province. The city was known in ancient times as Ambracia ). Arta is famous for its old bridge located over the Arachthos River, situated west of downtown. Arta is also known for its ancient sites from the era of Pyrrhus of Epirus and its 13th-century castle, one of the best preserved in Greece. Arta's rich Byzantine history can be also traced today via its many Byzantine churches; perhaps best known is the church of the Panagia Paregoretissa (Mother of God the Consoling), built about 1290 by Despot Nikephoros I Komnenos Doukas. The city is the seat of the Technological Educational Institute of Epirus.