Weida is a town in the district of Greiz, in Thuringia, Germany, situated 12 km south of Gera on the river Weida. Within the German Empire, Wei…Weida is a town in the district of Greiz, in Thuringia, Germany, situated 12 km south of Gera on the river Weida. Within the German Empire, Weida was part of the Grand Duchy of Saxe-Weimar-Eisenach. The Eisenhammer Weida is an historic hammer mill.