Concert for Buchenwald is one of Weimar's more uncomfortable cultural sites, and that is why it matters. It confronts the distance between the city's Goethe-and-Schiller self-image and the reality of Buchenwald on the Ettersberg above town, refusing to let the two histories sit in separate mental boxes.
Do not expect a conventional museum visit. This is a focused memorial and interpretive stop, best approached after you have spent time with Weimar's classical centre or before visiting the Buchenwald Memorial itself. It sharpens the question that shadows the city: how high culture and political violence occupied the same landscape.