The city of Nuremberg owes its importance partly to its geographic position, which made it a significant center for trade. In spite of considerable war damage, its old medieval city, now restored, remains as a monument to its importance in the late Middle Ages. By the 16th century Nuremberg has become a center of trade and of artistic activity. In art it could boast the presence of Albrecht Duerer and in poetry Hans Sachs and the Guild of Mastersingers, later to be celebrated by Wagner. Included are 2 Violin Sonatas by Mozart.