The Lobkowicz Palace is one family's collection, hung in the family's own rooms inside Prague Castle. Four centuries of a single household are on the walls: Pieter Bruegel the Elder's Haymaking, two views of London that Canaletto painted on commission here, orchestral parts marked in Beethoven's hand, and Mozart's re-scoring of Handel's Messiah. Between them hang relatives, sporting guns, dogs and dinner services, because this was a house before it was a museum.
What is unusual here is who is showing it to you. The collections were seized twice in one century and came back twice, the second time after 1989. The palace itself was handed back in 2002, and the family opened it as their own museum in 2007. None of that is smoothed over on the labels, so the losses are part of what you read as you go. It changes how the rooms feel. You are not walking a national collection assembled by a state; you are walking one household's things, put back on the walls of the house they were taken from, by the people they were taken from.