https://www.answers.com/military-history/Which_Swedish_king_was_shot_at_a_masked_ball
Which Swedish king was shot at a masked ball? - Answers
King Gustav III in 1792. From Wikipedia:A masked ball took place at the Royal Opera House in Stockholm at midnight on 16 March 1792. Gustav had arrived earlier...
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https://www.wga.hu/html/h/hoffmann1/4design9.html
Women's Dress for a Masked Ball by HOFFMANN, Josef
Page of Women's Dress for a Masked Ball by HOFFMANN, Josef in the Web Gallery of Art, a searchable image collection and database of European painting,...
a masked balldress forwomenhoffmannjosef