Music Museums with a Focus on Organs

Which organ museums are there in Germany?

The construction and history of organs are the focus of several museums in Germany.
The German Music Information Centre (miz) lists such musical instrument museums and collections, which are either independent or appear as departments of larger institutions, e.g. state, regional or city museums, museums with a cultural-historical focus or universities. In addition to these institutions, there are other museums that explore organ building within the context of other topics; The miz does not take these into account due to their usually small collection size.