Belvedere Palace near Weimar
There is also the Schloss Belvedere music high school and a Soviet cemetery on site.
Conclusion:
Belvedere Palace near Weimar can be reached by car from Erfurt via Autobahn 4 in just over 30 minutes. By public transport it takes around 50 minutes from Erfurt main station by train and bus to your destination. Bicycle also works. E.g. Via the Thuringian chain of cities to Weimar and then via Belvederer Allee to the castle of the same name.
We particularly liked the many beautiful trees in the park: