Ah, go on then!
[X] Sith Rionnasc
Altdorf feels like it could fall into 'patronise stealing artefacts for the sake of stealing artefacts' and the Vampire Coast will be explicitly burnishing and answering to a mad tyrant - and both of these are, to be clear, intriguing windows into the history and question of the museum and its purpose, but both are limited in their scope. Sith Rionnasc, meanwhile, inherently carries with it questions of imperial legacy and the potential to manoeuvre between a variety of different and likely competing sponsors and interests, all with the veneer and self-justification of a clear educational, cultural and political purpose. In short, it feels like the option with most potential to create a museum that deals with a variety of the fascinating questions that a museum entails without any one such question becoming so important that it drowns out the others.
[X] Tilea
That said, Tilea's pretty close to that balance too, so it gets an approval vote even if it doesn't look like things are going that way!