Mühlhausen is a city in the north-west of Thuringia, Germany, 5 km north of Niederdorla, the country's geographical centre, 50 km north-west of Erfurt, 65 km east of Kassel and 50 km south-east of Göttingen.
Mühlhausen was first mentioned in 967 and became one of the most important cities in central Germany in the late Middle Ages. In the mid-13th century, it became a Freie Reichsstadt, an independent and republican self-ruled member of the Holy Roman Empire, controlling an area of approximately 220 square kilometres and 19 regional villages. Due to its long-distance trade, Mühlhausen was prosperous and influential with a population of 10,000 around 1500.
Wikipedia https://en.wikipedia.org/wiki/Mühlhausen
Coordinates 51°12'33.932" N 10°27'32.056" E