The Gewandhaus and Opera House are both on the main Augustus Platz. If you have the former on your right, and latter the left, walk straight ahead to the left of the Post Office you will soon come to the fabulous three part Grassi Museum which comprises a Musical Instrument, Ethnographical and Applied Arts museums. Also there are many music places such as both the Schumann and Mendelssohn House museums, that for JS Bach is currently closed.