Kassel Royal Theater Orchestra Posted byWebmaster March 9, 2016July 16, 2020 Orchestra of the Royal Theater. If you have found any errors, please, notify us by selecting that text and pressing Ctrl+Enter. Related posts: Gustav Mahler’s Legacy Amsterdam Royal Concertgebouw Mahler Festival 1920 Amsterdam Willem Mengelberg (1871-1951) Amsterdam Royal Concertgebouw Orchestra (RCO) Mahler Festival 1995 Amsterdam