📅 Today in HistoryOctober 29

Constantine the Great enters Rome after his victory at the Battle of the Milvian Bridge, stages a grand adventus in the city, and is met with popular jubilation. Maxentius' body is fished out of the Tiber and beheaded.

Valentinian III, Western Roman Emperor, marries Licinia Eudoxia, daughter of his cousin Theodosius II, Eastern Roman Emperor in Constantinople unifying the two branches of the House of Theodosius.

First trial for witchcraft in Paris leading to the death of three people.

Battle of Brustem: Charles the Bold defeats Prince-Bishopric of Liège.

Russian homage to the King of Poland, Sigismund III Vasa.

The London Pageant of 1621 celebrates the inauguration of Edward Barkham (Lord Mayor).

Second Northern War: Naval forces of the Dutch Republic defeat the Swedes in the Battle of the Sound.

Portuguese forces defeat the Kingdom of Kongo and decapitate King António I of Kongo, also known as Nvita a Nkanga.

Leibniz makes the first use of the long s (∫) as a symbol of the integral in calculus.

Mount Hood (Oregon) is named after Samuel Hood, 1st Viscount Hood by Lt. William E. Broughton who sighted the mountain near the mouth of the Willamette River.