📅 Today in HistoryApril 21

Romulus founds Rome (traditional date).

Battle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius, who is killed. Antony fails to capture Mutina and Decimus Brutus is murdered shortly after.

The Laguna Copperplate Inscription (the earliest known written document found in what is now the Philippines): the Commander-in-Chief of the Kingdom of Tondo, as represented by the Honourable Jayadewa, Lord Minister of Pailah, pardons from all debt the Honourable Namwaran and his relations.

The Diocese of Pisa is elevated to the rank of metropolitan archdiocese by Pope Urban II

The three-day Lisbon Massacre comes to an end with the slaughter of over 1,900 suspected Jews by Portuguese Catholics.

Henry VIII ascends the throne of England on the death of his father, Henry VII.

The last ruler of the Lodi dynasty, Ibrahim Lodi is defeated and killed by Babur in the First Battle of Panipat.

The Wignacourt Aqueduct is inaugurated in Malta.

The city of Rattanakosin, now known internationally as Bangkok, is founded on the eastern bank of the Chao Phraya River by King Buddha Yodfa Chulaloke.

John Adams sworn in as first US Vice President (nine days before George Washington).