9 notable people died on October 21, including Birger Jarl, Marcus Junius Brutus, Piero della Francesca.
19th Century
3 deaths
David Bates Douglass
academicarchitect
American civil and military engineer; academic administrator; and cemetery architect (1790-1849)
Jacques Babinet
astronomermathematician
French physicist, mathematician and astronomer
James Henry Greathead
civil engineerengineer
British civil engineer (1844-1896)
18th Century
3 deaths
Johann Juncker
chemistphysician
German physician and chemist (1679-1759)
Guy Tachard
Catholic priestdiplomat
French Jesuit missionary and mathematician
Louis de l'Isle
astronomerexplorer
French explorer and astronomer
15th Century
1 death
Piero della Francesca
art theoristmathematician
Italian painter and mathematician (c. 1416–1492)
13th Century
1 death
Birger Jarl
military personnelmonarch
Jarl and ruler of Sweden (c.1210–1266)
1st Century BC
1 death
Marcus Junius Brutus
philosopherpoet
Assassin of Julius Caesar
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