It was based in the lagoon communities of the historically prosperous city of Venice, and was a leading European economic and trading power during the Middle Ages and the Renaissance, the most successful of Italy's maritime republics. By the late Middle Ages, it held significant territories in the mainland of northern Italy, known as the Domini di Terraferma, along with most of the Dalmatian coast on the other side of the Adriatic Sea, and Crete and numerous small colonies around the Mediterranean Sea, together known as the Stato da Màr.