Bad Ischl (bät ĭshˈəl) [key] or Ischl, city (1991 pop. 13,887), in Upper Austria prov., W Austria, in the center of the Salzkammergut. It is a famous spa. After 1822 it was the summer residence of the Austrian imperial family. Emperor Francis Joseph signed (1914) his declaration of war on Serbia there.
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