What happened on January 11

49 documented historical events happened on January 11, from antiquity to the present day. The best known is this: Theodora Porphyrogenita became the sole ruler of the Byzantine Empire after the death of her brother-in-law Constantine IX Monomachos. On the same day, in another year: Arauco War: The Mapuche-Huilliche of southern Chile defeated a slave-hunting Spanish army at the Battle of Río Bueno. 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 January 11, including Albert Hofmann, Pierre Mendès France, Abraham Joshua Heschel. 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.

133 people with a Wikipedia article died on January 11, including Pope John VI, Emperor Kōnin, Staurakios. 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 January 11 around the world: Children's Day (Tunisia), Christian feast day: Anastasius of Suppentonia (Roman Catholic), Christian feast day: Leucius of Brindisi (Roman Catholic), Christian feast day: Paulinus II of Aquileia, Christian feast day: Pope Hyginus, Christian feast day: Theodosius the Cenobiarch. 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.