The Issenheim altarpiece on its own is a reason to...

The Issenheim altarpiece on its own is a reason to visit the museum. Its location and courtyard are also valuable aspects. The rest of the collection seems a bit arbitrary, though I can recommend the art from the middle ages and the large closets in the design department upstairs. The modern art seems like an afterthought and I wouldn't bother with it if you're as impressed by the older arts as I am.