Who can fail to be attracted by the stars? Built under Elector Carl Theodor, the old observatory was the place for celestial observations and for surveying the different parcels of land that made up the state of Baden. Even Wolfgang A. Mozart and Thomas Jefferson paid a visit. Today, one of the city's oldest surviving buildings is home to numerous artists' studios. Thanks to extensive refurbishment, it can now be seen in all its former baroque splendour.
Top tip: The best way to discover the heart of this cultural monument is at one of the regular readings, concerts and open days that are held there.