21 June

1307 Peking, Politics. Wuzong (Wu Tsung or Chih-Ta) of Yuan became Mongol Emperor of China. He distributed the works of Confucius in the land and supported Buddhists temples. Paper money was used extensively during this period, although only two examples of Yuan Dynasty paper money remain today. For that reason the Chinese currency has been called Yuan. I could not find any images of the currency. N.B. the Wikipedia entry on this man is a mess.
YuanEmperorAlbumQaishanKulugPortrait.jpg
1788 Concord, New Hampshire was the ninth state to ratify the United States Constitution securing the necessary three-quarters of states.
New Hampshire.jpg
1934 Lincoln, NE. Samuel Herman Gottscho snapped this photograph of the north facade of the Nebraska state capitol in Lincoln, Nebraska. Gottscho photographed architecture for years and compiled an archive of 45,000 items now held by the Library of Congress.
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1948 Dr Peter Goldmark of CBS Laboratories demonstrated the long-playing record with twenty minutes of music on each side. Although the RCA 78s offered a higher quality sound, when played on the right but expensive equipment, the length of the LP made it a market success. Goldmark was motivated by the desire for longer pieces of classical music, like that of Johannes Brahms, to be played without interruption.
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1956 Washington, DC, Politics. University of Michigan graduate playwright Arthur Miller refused to answer questions before the House Un-American Activities Committee. He was stripped of his passport, and cited for contempt of Congress and fined. A later appeal exonerated him. Pictured below is the HUAC circus at work destroying careers and lives without achieving anything.
HUAC circus.jpg