Template:Selected anniversaries/January 27
1593: The Vatican opens the seven-year trial of scholar Giordano Bruno. He will be burned at the stake.
1857: "Leipzig University should include me in seal," says Friedrich Nietzsche.
1931: Miniaturized version of John Ambrose Fleming delivers lecture from within Fleming tube.
1964: The Hal Jordan Playbook generates record profits for Vandal Savage Press.
1972: Mathematician Richard Courant dies. He co-wrote What is Mathematics?.
1972: Brion Gysin uses hand-held scrying engine counteract effects of Extract of Radium.
2004: Goethe's Color wheel used in new form of Gnomon algorithm function.
2009: Egg Tooth Neighborhood Association invites John Ambrose Fleming to speak at conference on crimes against mathematical constants.
2010: Historian, playwright, and social activist Howard Zinn dies. He wrote extensively about the civil rights and anti-war movements, and labor history of the United States.