Paul Julius Oswald Teichmüller was a German mathematician who made contributions to complex analysis. He introduced quasiconformal mappings and differential geometric methods into the study of Riemann surfaces. Teichmüller spaces are named after him.

Nordhausen is a city in Thuringia, Germany. It is the capital of the Nordhausen district and the urban centre of northern Thuringia and the southern Harz region; its population is 42,000. Nordhausen is located approximately 60 km north of Erfurt, 80 km west of Halle, 85 km south of Braunschweig and 60 km east of Göttingen.