Today, Weisenau is a southern suburb of the city of Mainz in the German State of Rheinland-Pfalz. Names Weisenau, Stadt Mainz, Rheinland-Pfalz Surnames Beratz Gilge* Evangelische Kirche in Wiesenau (2010). Source: Rudolf Stricker via Wikipedia Commons. 49.982778, 8.303056