Since I cannot really add to Linda Kaye's splendid journal and this is solely to update the location of the Trésor, I may as well be precise about it. The Trésor is now the principal exhibit of the Musée des Arts Ancient du Namurois, which is located in L'Hotel de Gaillier d'Hestroy at the above address.
I don't know whether it's really better for it to be in this lovely house - it really is very nice - or whether the nature of the Trésor makes it more exciting to go into the back streets as Linda did. However, the layout is fine. There are two separate buildings, and the one with the video is the one without a lift.
Fortunately, the very kind curators allowed me to watch a computer not normally available to the public in the other building. Whether the public one was multi-lingual, I don't know, but mine was in French only, so I learned less than I might have wished about the background and history.
Something that impressed me was that the small sections of the various items could be magnified very substantially on the computer without any loss of clarity at all. This is a terrific tribute to the artist who only had hand tools for his craft.
I have to urge anybody who reads this without having read Linda's first to look at hers now.
The cost is €5 adult and €3.50 for concessionaries [I think less for children].