This museum is the result of a collection by Friedrich von Schack in the nineteenth century, hence the name of the museum. It was contemporary German artists that he collected and the gallery is filled with Bocklin, Feuerbach, von Schwind and Spitzweg. Some of the collection is quite good in particular the landscapes on the top floor.
But other aspects...
Its actually called Sammlung Schack. Door is on main frontage and I walked by first time as it was shut as if they didn't want any visitors. Poor quality imo and too many pointless copies of Titian and other classical painters.
This museum is not on the top list of sightseeing tours around Munich, but it owns noted private collection of paintings containing masterpieces of Romanticism and it is worth of visit. You will not regret. It's located some 1.43 km north-east from the city centre on the royal avenue Prinzregentenstraße.
Most probably not many tourists know this museum. We think taht even the locals doesn't know it. The collection what is on display is first class. If you are an art lover, than it is a must to visit it. Graf Schack who collected the works bought only German paintings. So you can learn a lot about the 17.-19. century...