October 23: edit
- 4004 BC - On the preceding eve of this day (in the proleptic Julian calendar), the universe was created, according to the archbishop James Ussher in what is now called the Ussher-Lightfoot Calendar.
- 502 - The Synodus Palmaris, called by Gothic king Theodoric the Great, discharges Pope Symmachus of all charges, thus ending the schism of Antipope Laurentius.