Martin Luther was thoroughly familiar with the Gotha monastery. He visited it six times, preached here and in April 1515 the Augustinian monks appointed him their district vicar. He also formulated his first will here, the so-called Gothaer Testament. In it he decreed that he wanted to be buried in Gotha. Since 2010, the Augustinian monastery has been a modern meeting center of the Protestant church with a hostel, café and historical library. Source: tourismus-thueringer-wald.de/bach-und-mehr/augustinerkloster-gotha
In 1216, Cistercian nuns founded a monastery in Gotha, which in 1258 came into the possession of the Augustinian monks. They expanded the monastery and built a new church. After the Reformation and the dissolution of the Augustinian convent, the church was rebuilt in 1676 under Duke Ernst I by Andreas Rudolph again and equipped until 1680 early Baroque. She received two-storey galleries (Wikipedia).