30-11-1903 until 02-12-1903. Year 1903. 30-11-1903 Letter to Alma Mahler (1879-1964). Year 1903. 01-12-1903 Letter to Alma Mahler (1879-1964). Hotel Imperial. Hotel Imperial. Hotel Imperial. Related posts: Mahler Festival 1920 Amsterdam Gustav Mahler’s Legacy Anna Justine Mahler (Gucki) (1904-1988) Gustav Mahler-Alfred Rosé Collection – Inventory Willem Mengelberg (1871-1951) Year 1886