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📅 Sep 23, 1122
The Concordat of Worms Ends the Investiture Controversy
On September 23, 1122, the Concordat of Worms ended the Investiture Controversy between the papacy and the Holy Roman Empire.
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📅 Sep 23, 1846
Neptune Is Found Where the Mathematics Said It Would Be
On September 23, 1846, Neptune was observed at Berlin within a degree of the position predicted by Le Verrier's mathematics.
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📅 Sep 23, 1889
Fusajiro Yamauchi Founds Nintendo in Kyoto
On September 23, 1889, Nintendo was founded in Kyoto by Fusajiro Yamauchi to produce handmade hanafuda playing cards.
⛳Japan
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📅 Sep 23, 1932
The Kingdom of Saudi Arabia Is Proclaimed
On September 23, 1932, Ibn Saud proclaimed the Kingdom of Saudi Arabia, uniting Hejaz and Nejd under one state.
⛳Saudi Arabia
📖Politics
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📅 Sep 23, 1999
NASA Loses Contact with the Mars Climate Orbiter
On September 23, 1999, NASA lost the Mars Climate Orbiter because of a mismatch between imperial and metric units.