1532 was an important year in the history of the Danube River. In 1532, the Treaty of Nuremberg was signed, ending the Habsburg/Ottoman conflicts along the Danube and establishing Christian-Ottoman borders. This marked the end of the Ottoman Empire's expansion into Hungary and the establishment of a permanent border between the two empires. It also marked the beginning of direct trade and diplomatic contact between the two empires. Along the Danube, during this period, the principle Danubian provinces of Transylvania, Wallachia, Moldavia and Hungary were divided between the two empires, with the Eastern portion under Ottoman control. The Treaty of Nuremberg also provided for autonomy to the rulers of Wallachia and Transylvania, which would later become part of Romania. This autonomy established a buffer state between the two empires.
Additionally, the Treaty of Nuremberg stated that the Danube would be free of tolls and free trade would be permitted on it, allowing the river to become an increasingly important trade route between Europe and the Middle East.
In 1532, the Danube also saw a major naval battle between the Ottoman and Hapsburg Empires. This was the Battle of Gomoros, which was fought mainly in the Gomoros Channel, a strait of the Balkan Sea that connects the Aegean Sea and the Black Sea. This battle resulted in a decisive Hapsburg victory.
Finally, 1532 marked the year that the Danube Wetlands were established. These wetlands are a protected series of marshes and swamps located in the Danube delta that provide habitat for numerous species of birds, fish, and other wildlife.