April 13 in History

Pope Victor II, born Gebhard von Dollnstein-Hirschberg, was the head of the Catholic Church and ruler of the Papal States from 13 April 1055 until his death in 1057. Victor II was one of a series of German-born popes who led the Gregorian Reform.

Salah ad-Din Yusuf ibn Ayyub, commonly known as Saladin, was a Kurdish commander and political leader. He was the founder of the Ayyubid dynasty and the first sultan of both Egypt and Syria. An important figure of the Third Crusade, he spearheaded the Muslim military effort against the Crusader states in the Levant. At the height of his power, the Ayyubid realm spanned Egypt, Syria, Upper Mesopotamia, the Hejaz, Yemen, and Nubia.

The Thirteen Years' War, also called the War of the Cities, was a conflict fought in 1454–1466 between the Prussian Confederation, allied with the Crown of the Kingdom of Poland, and the State of the Teutonic Order.

Sir Samuel Argall was an English sea captain, navigator, and Deputy-Governour of Virginia, an English colony.

George Frideric Handel was a German-British Baroque composer well-known for his operas, oratorios, anthems, concerti grossi, and organ concerti.

The Roman Catholic Relief Act 1829, also known as the Catholic Emancipation Act 1829, was an act of the Parliament of the United Kingdom that removed the sacramental tests that barred Roman Catholics in the United Kingdom of Great Britain and Ireland from Parliament and from higher offices of the judiciary and state. It was the high point of a fifty-year process of Catholic emancipation which had offered Catholics successive measures of "relief" from the anti-Catholic civil and political disabilities imposed by Penal Laws in both the Kingdom of Great Britain and the Kingdom of Ireland in the seventeenth and early eighteenth centuries.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union to preserve slavery in the United States. The South saw slavery as threatened because of the election of Abraham Lincoln and the growing abolitionist movement in the North. The war ended with Union victory, the dissolution of the Confederacy and the abolition of slavery, freeing four million African Americans.

The Metropolitan Museum of Art, colloquially referred to as the Met, is an encyclopedic art museum in New York City. By floor area, it is the fourth-largest museum in the world and the largest art museum in the Americas. With 5,727,258 visitors in fiscal year 2025, it was the most-visited museum in the United States and the fifth-most visited art museum in the world.

The 31 March incident was an uprising in the Ottoman Empire in April 1909, during the Second Constitutional Era. The incident broke out during the night of 30–31 Mart 1325 in Rumi calendar, thus named after 31 March where March is the equivalent to Rumi month Mart. Occurring soon after the 1908 Young Turk Revolution, in which the Committee of Union and Progress (CUP) had successfully restored the Constitution and ended the absolute rule of Sultan Abdul Hamid II, it is sometimes referred to as an attempted countercoup or counterrevolution. It consisted of a general uprising against the CUP within Constantinople, largely led by reactionary groups, particularly Islamists opposed to the secularising influence of the CUP and supporters of absolutism, although liberal opponents of the CUP within the Liberty Party also played a lesser role. Eleven days later the uprising was suppressed and the former government restored when elements of the Ottoman Army sympathetic to the CUP formed an impromptu military force known as the Action Army. Upon entering Constantinople on 24 April Sultan Abdul Hamid II, accused by the CUP of complicity in the uprising, was deposed and the Ottoman National Assembly elevated his half-brother, Mehmed V, to the throne. Mahmud Shevket Pasha, the military general who had organised and led the Action Army, became the most influential figure in the restored constitutional system until his assassination in 1913.

A.E.K. is the most successful Greek multi-sport club, based in Nea Filadelfeia, Athens, Attica. The club is more commonly known in European competitions as A.E.K. Athens.

World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated. World War II was the deadliest conflict in history, causing the death of 60 to 75 million people. Millions died as a result of massacres, starvation, disease, and genocides, including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

Nazi Germany, officially the German Reich and later the Greater German Reich, was the German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a totalitarian dictatorship. The Third Reich, meaning "Third Realm" or "Third Empire", referred to the Nazi claim that Nazi Germany was the successor to the Holy Roman Empire (800–1806) and the German Empire (1871–1918). The Third Reich, which the Nazis referred to as the Thousand-Year Reich, ended in May 1945, after 12 years, when the Allies defeated Germany and entered the capital, Berlin, ending World War II in Europe.

Hadassah Medical Center is an Israeli medical organization established in 1934 that operates two university hospitals in Jerusalem as well as schools of medicine, dentistry, nursing, and pharmacology affiliated with the Hebrew University of Jerusalem. Its mission is to extend a "hand to all, without regard for race, religion or ethnic origin."

The 36th Academy Awards, honoring the best in film for 1963, were held on April 13, 1964, hosted by Jack Lemmon at the Santa Monica Civic Auditorium in Santa Monica, California. This ceremony introduced the category for Best Sound Effects, with It's a Mad, Mad, Mad, Mad World being the first film to win the award.

The Universal Postal Union is a specialized agency of the United Nations (UN) that coordinates postal policies among member nations and facilitates a uniform worldwide postal system. It has 192 member states and is headquartered in Bern, Switzerland.

The 1975 Beirut bus massacre, also known as the Ain el-Rammaneh incident and Black Sunday, was the collective name given to a short series of armed clashes involving Phalangist and Palestinian elements in the streets of central Beirut, which is commonly presented as the spark that set off the Lebanese Civil War in the mid-1970s.

The Lapua Cartridge Factory explosion was an industrial disaster that occurred at the State Cartridge Factory in Lapua, Finland on 13 April 1976. It caused the deaths of 40 workers, while 60 people were injured. It remains Finland's worst industrial disaster.

Eldrick Tont "Tiger" Woods is an American professional golfer. He is widely regarded as one of the greatest golfers of all time and as one of the most famous athletes in modern history. Woods is tied for first in PGA Tour wins, ranks second in men's major championships, holds numerous golf records, and is an inductee of the World Golf Hall of Fame.

The Kamień Pomorski homeless hostel fire occurred in north-western Poland on 13 April 2009. The fire occurred during the night at a three-story homeless hostel in Kamień Pomorski. Twenty-three people, including 13 children, were pronounced dead, with a further 20 sustaining an injury of some sort. It was Poland's deadliest fire since a conflagration destroyed a home for the mentally ill in Górna Grupa in 1980 claiming the lives of 55 victims.

Lion Air Flight 904 was a scheduled domestic passenger flight from Husein Sastranegara International Airport in Bandung to Ngurah Rai International Airport in Bali, Indonesia. On 13 April 2013, the Boeing 737-800 operating the flight crashed into water short of the runway while on final approach to land. All 101 passengers and 7 crew on board survived the accident. At 3:10 pm, the aircraft crashed approximately 1.1 kilometres (0.6 nmi) short of the seawall protecting the threshold of Runway 09. The aircraft's fuselage broke into two and 46 people were injured, 4 of them seriously.

Jack Douglas Teixeira is an American former airman in the 102nd Intelligence Wing of the Massachusetts Air National Guard. In April 2023, following an investigation into the removal and disclosure of hundreds of classified Pentagon documents, Teixeira was arrested by FBI agents and charged with unauthorized retention and transmission of national defense information in violation of the Espionage Act of 1917 and unauthorized removal and retention of classified documents or material. In March 2024, Teixeira pleaded guilty to six counts of willful retention and transmission of national defense information.

Rory Daniel McIlroy is a Northern Irish professional golfer who plays on the PGA Tour and the European Tour. He is a former world number one in the Official World Golf Ranking and has spent over 100 weeks in that position during his career. A six-time major champion, he is the sixth man to complete the modern career grand slam—after Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus, and Tiger Woods—and the first European to do so.