Notable Deaths on October 15

Titus Lucretius Carus was a Roman poet and philosopher. His only known work is the philosophical poem De rerum natura, a didactic work about the tenets and philosophy of Epicureanism, which usually is translated into English as On the Nature of Things—and somewhat less often as On the Nature of the Universe. Very little is known about Lucretius's life; the only certainty is that he was either a friend or client of Gaius Memmius, to whom the poem was addressed and dedicated. De rerum natura was a considerable influence on the Augustan poets, particularly Virgil and Horace. The work was almost lost during the Middle Ages, but was rediscovered in 1417 in a monastery in Germany by Poggio Bracciolini. It played an important role both in the development of atomism and the efforts of various figures of the Enlightenment era to construct a new Christian humanism.

General Sir Michael David Jackson was a British Army officer and one of its most high-profile generals since the Second World War. Originally commissioned into the Intelligence Corps in 1963, he transferred to the Parachute Regiment in 1970, with which he served two of his three tours of duty in Northern Ireland. On his first, he was present as an adjutant at the events of the Ballymurphy massacre (1971), where eleven unarmed civilians were shot dead by British troops, and then at Bloody Sunday in 1972, when British soldiers opened fire on unarmed protesters, killing fourteen. On his second, he was a company commander in the aftermath of the Warrenpoint ambush (1979), when the IRA killed 18 soldiers with two roadside bombs, the British Army's heaviest single loss of life during the Troubles. He was assigned to a staff post at the Ministry of Defence (MoD) in 1982 before assuming command of the 1st Battalion, Parachute Regiment, in 1984. Jackson was posted to Northern Ireland for the third time, as a brigade commander, in the early 1990s.

Abū Bakr al-Rāzī, also known as Rhazes, 864 or 865 – 925 or 935 CE, was a Persian physician, philosopher and alchemist who lived during the Islamic Golden Age. He is widely regarded as one of the most important figures in the history of medicine, and also wrote on logic, astronomy and grammar. He is also known for his criticism of religion, especially with regard to the concepts of prophethood and revelation. However, the religio-philosophical aspects of his thought, which also included a belief in five "eternal principles", are fragmentary and only reported by authors who were often hostile to him.

ʿAbd al-Raḥmān ibn Muḥammad ibn ʿAbd Allāh ibn Muḥammad ibn ʿAbd al-Raḥmān ibn al-Ḥakam al-Rabdī ibn Hishām ibn ʿAbd al-Raḥmān al-Dākhil al-Marwānī al-Umawī al-Qurashī, or simply ʿAbd al-Raḥmān III, was the Umayyad Emir of Córdoba from 912 to 929, at which point he founded the Caliphate of Córdoba, serving as its first caliph until his death. Abd al-Rahman won the laqab (sobriquet) al-Nāṣir li-Dīn Allāh in his early 20s when he supported the Maghrawa Berbers in North Africa against Fatimid expansion and later claimed the title of Caliph for himself. His half-century reign was known for its religious tolerance.

Karl Philipp, Fürst zu Schwarzenberg was an Austrian Generalissimo and former Field Marshal. He first entered military service in 1788 and fought against the Turks. During the French Revolutionary War, he fought on the allied side against France and in that period rose through the ranks of the Imperial Army. During the Napoleonic Wars, he fought in the Battle of Wagram (1809), which the Austrians lost decisively against Napoleon. He had to fight for Napoleon in the battles of Gorodechno and Wolkowisk (1812) against the Russians and won. During the War of the Sixth Coalition, he was in command of the allied army that decisively defeated Napoleon in the Battle of Leipzig (1813). He participated in the Battle of Paris (1814), which forced Napoleon to abdicate.

Elizabeth (Betty) Mary Driver was a British actress and singer, best known for her role as Betty Williams in the long-running ITV soap opera Coronation Street, a role she played for 42 years from 1969 to 2011, appearing in 2,732 episodes. She had previously appeared as Mrs Edgley in Coronation Street spin-off Pardon the Expression (1965–1966) opposite Arthur Lowe. In her early career Driver was a singer, appearing in musical films such as Boots! Boots! (1934), opposite George Formby, and in Penny Paradise (1938), directed by Carol Reed. She was made an MBE in the 2000 New Year Honours.

Petronilla, whose name is also spelled Petronila or Petronella, was Queen of Aragon (1137–1164) from the abdication of her father, Ramiro II, in 1137 until her own abdication in 1164. After her abdication she acted as regent during the minority of her son Alfonso II of Aragon (1164–1173). She was the last ruling member of the Jiménez dynasty in the Kingdom of Aragon, and by marriage to Ramon Berenguer IV, Count of Barcelona brought the House of Barcelona to the throne of Aragon, uniting the Kingdom of Aragon with the County of Barcelona to create the Crown of Aragon.

Abu’l-ʿAbbās Aḥmad ibn Jaʿfar ibn Muḥammad ibn Hārūn al-Muʿtamid ʿalā’Llāh, better known by his regnal name al-Muʿtamid ʿalā 'llāh, was the caliph of the Abbasid Caliphate from 870 to 892. His reign marks the end of the "Anarchy at Samarra" and the start of the Abbasid restoration, but he was largely a ruler in name only. Power was held by his brother al-Muwaffaq, who held the loyalty of the military. Al-Mu'tamid's authority was circumscribed further after a failed attempt to flee to the domains controlled by Ahmad ibn Tulun in late 882, and he was placed under house arrest by his brother. In 891, when al-Muwaffaq died, loyalists attempted to restore power to the Caliph, but were quickly overcome by al-Muwaffaq's son al-Mu'tadid, who assumed his father's powers. When al-Mu'tamid died in 892, al-Mu'tadid succeeded him as caliph.

Frances Elizabeth Somerville Alexander was a British geologist, academic, and physicist, whose wartime work with radar and radio led to early developments in radio astronomy and whose post-war work on the geology of Singapore is considered a significant foundation to contemporary research. Alexander earned her PhD from Newnham College, Cambridge, and worked in Radio Direction Finding at Singapore Naval Base from 1938 to 1941. In January 1941, unable to return to Singapore from New Zealand, she became Head of Operations Research in New Zealand's Radio Development Lab, Wellington. In 1945, Alexander correctly interpreted that anomalous radar signals picked up on Norfolk Island were caused by the sun. This interpretation became pioneering work in the field of radio astronomy, making her one of the first women scientists to work in that field, albeit briefly.

Deng Ken was a Chinese politician who served as Vice Governor of Hubei. During a political career spanning more than five decades, he held a number of senior Party and government positions. A member of the Chinese Communist Party from 1937, Deng participated in the Communist movement before the establishment of the People's Republic of China, working in Shanghai, Yan'an and Northeast China during the Second Sino-Japanese War and the Chinese Civil War. He was the younger brother of former Chinese paramount leader Deng Xiaoping and although their careers occasionally intersected, he spent most of his political life serving in regional administrative roles rather than in the central government.

Dolores Jiménez y Muro was a Mexican revolutionary, schoolteacher, poet, and military commander. Born in Aguascalientes, Jiménez and her family moved to San Luis Potosí when she was young. She did not receive a formal education but was privately tutored and became well-known for her civic poetry. After Porfirio Díaz became president of Mexico in 1876, establishing a dictatorial regime, Jiménez grew concerned with the plight of Mexico's poor, becoming a schoolteacher and philanthropist. She also began writing for various political journals. In 1904, she moved to Mexico City, where she joined the liberal Ponciano Arriaga Liberal Club and helped found the trade union federation Mexican Socialism.

Kaikhosru Shapurji Sorabji was an English composer, music critic, pianist and writer. His music, written over a period of seventy years, ranges from sets of miniatures to works lasting several hours. One of the most prolific 20th-century composers, he is best known for his piano pieces, notably nocturnes such as Gulistān and Villa Tasca, and large-scale, technically intricate compositions, which include seven symphonies for piano solo, four toccatas, Sequentia cyclica and 100 Transcendental Studies. He felt alienated from English society by reason of his homosexuality and mixed ancestry, and had a lifelong tendency to seclusion.

William Eugene Smith was an American photojournalist. He has been described as "perhaps the single most important American photographer in the development of the editorial photo essay." His major photo essays include World War II photographs, the visual stories of an American country doctor and a nurse midwife, the clinic of Albert Schweitzer in French Equatorial Africa, the city of Pittsburgh, and the pollution which damaged the health of the residents of Minamata in Japan. His 1948 series, Country Doctor, photographed for Life, is now recognized as "the first extended editorial photo story".

Andries van Wezel, Latinized as Andreas Vesalius, was an anatomist and physician who wrote De Humani Corporis Fabrica Libri Septem, which is considered one of the most influential books on human anatomy and a major advance over the long-dominant work of Galen. Vesalius is often referred to as the founder of modern human anatomy. He was born in Brussels, which was then part of the Habsburg Netherlands. He was a professor at the University of Padua (1537–1542) and later became Imperial physician at the court of Emperor Charles V.

Pope Urban VI, born Bartolomeo Prignano, was head of the Catholic Church from 8 April 1378 to his death, in October 1389. He was the last pope elected from outside the College of Cardinals. His pontificate began shortly after the end of the Avignon Papacy. It was marked by immense conflict between rival factions as a part of the Western Schism, with much of Europe, such as France, the Iberian Kingdoms of Castile and Aragon, and Scotland recognizing Clement VII, based in Avignon, as the true pope.

Zdeněk Fibich was a Czech composer of classical music. Among his compositions are chamber works, symphonic poems, three symphonies, at least seven operas, melodramas including the substantial trilogy Hippodamia, liturgical music including a mass – a missa brevis; and a large cycle of piano works called Moods, Impressions, and Reminiscences. The piano cycle served as a diary of sorts of his love for a piano pupil, and one of the pieces formed the basis for the short instrumental work Poème, for which Fibich is best remembered today.

Carlo Gambino was a Sicilian crime boss who was the leader and namesake of the Gambino crime family of New York City. Following the Apalachin Meeting in 1957, and the imprisonment of Vito Genovese in 1959, Gambino took over the Commission of the American Mafia and played a powerful role in organized crime until his death from a heart attack in 1976. During a criminal career that spanned over fifty years, Gambino served only twenty-two months in prison, for a tax evasion charge in 1937.

Rudolf of Rheinfelden was Duke of Swabia from 1057 to 1079. Initially a follower of his brother-in-law, the Salian emperor Henry IV, his election as German anti-king in 1077 marked the outbreak of the Great Saxon Revolt and the first phase of open conflict in the Investiture Controversy between the Emperor and the Papacy. After a series of armed conflicts, Rudolf succumbed to his injuries after his forces defeated Henry's in the Battle on the Elster.

Letitia Elizabeth Landon was an English poet and novelist, better known by her initials L.E.L. Her first major breakthrough came with The Improvisatrice and she developed the metrical romance towards the Victorian ideal of the Victorian monologue, influencing fellow English writers such as Elizabeth Barrett Browning, Robert Browning, Alfred Tennyson and Christina Rossetti. Her influence can also be found in the United States, where she was very popular. Edgar Allan Poe regarded her genius as self-evident.