The full title is The National Museum of Music and Musical Instruments. I can't compete with the information in the website but make sure you click on hte About button - there's far more to it than on many sites - including history.
If you are going by bus, make sure you get informed about where to get the bus back - there's a slight change of route during part of the afternoon -but don't let this put you off going. The instrument colection is fascinating and the tour of the house, where guides play the old keyboard instruments is better than I've seen anywhere else.
