What happened on April 21

53 documented historical events happened on April 21, from antiquity to the present day. The best known is this: According to the calculations of the ancient Roman scholar Varro Reatinus, Romulus and Remus legendarily founded the city of Rome. On the same day, in another year: Forces led by Mark Antony fought the Battle of Mutina against those of Decimus Brutus, one of Julius Caesar's assassins. On Almanaccolo every event is listed in chronological order, grouped by century, and links to the Wikipedia article it comes from, so you can always read further or check the source. Alongside the events you find who was born and who died on this date, and which observances are celebrated around the world.

160 people with a Wikipedia article were born on April 21, including Jan van Riebeeck, Pieter Gerritsz van Roestraten, Simon de la Loubère. The list spans every era and every field — art, science, politics, sport, entertainment — ordered by year of birth, from the earliest to the most recent. The six featured people are those most has been written about: the ordering uses the length of their Wikipedia article as an indicator of prominence. For each one you find their occupation, year of birth and a link to the full biography.

86 people with a Wikipedia article died on April 21, including Emperor Xian of Han, Liuvigild, Bardas. The list is in chronological order by year of death and spans all of documented history, from antiquity to the present day. For each person you find their occupation, the year and a link to the Wikipedia biography, where the full story and its sources can be read.

16 observances are celebrated on April 21 around the world: Christian feast day: Abdecalas, Christian feast day: Anastasius Sinaita, Christian feast day: Anselm of Canterbury, Christian feast day: Conrad of Parzham, Christian feast day: Holy Infant of Good Health, Christian feast day: Máel Ruba. The list gathers national holidays, international days and religious or civil observances falling on this date in different countries, as recorded on Wikipedia. Some are fixed and recur on the same day every year; others depend on the local calendar. Each links to the article explaining its origin and meaning.