Full Name: Leonardo di ser Piero da Vinci; Profession: Italian Renaissance polymath—painter, draftsman, engineer, scientist, theorist, sculptor, architect, and inventor whose work epitomized the Renaissance humanist ideal; Nationality: Italian; Born: 15 April 1452; Birthplace: Anchiano, near Vinci, in the Republic of Florence (in present-day Italy); Generation: Italian Renaissance / High Renaissance generation, widely regarded by historians and art scholars as one of the defining geniuses of that era and a central figure in the development of High Renaissance art and thought; Chinese Zodiac: Water Monkey (Chinese lunar year beginning 31 January 1452, with Leonardo specifically listed by traditional-zodiac references as a Water Monkey born on 15 April 1452); Zodiac Sign: Aries (Sun in Aries for births between late March and 19 April, with 15 April explicitly classified as an Aries birthday); Age in 2026: 574 years old if still living, given his birth in 1452 and the current year 2026, though he actually died aged 67 in 1519 based on contemporary records and modern scholarly reconstructions. Marital Status: Never married, with biographical research and major reference works agreeing that Leonardo formed close friendships and professional partnerships but chose a life without formal marriage or confirmed long-term romantic unions; Children: No known children, with modern genealogical work clarifying that so‑called “descendants” are relatives traced through his family line rather than biological offspring, since Leonardo himself left no issue. Description: Leonardo da Vinci is the single most globally renowned figure born on April 15, celebrated as perhaps the archetypal universal genius whose artistic, scientific, and technological achievements have remained central to world culture for over five centuries; his fame first rested on his paintings, including the Mona Lisa, regarded as the world’s most famous individual painting. The Last Supper, the most reproduced Christian religious image, and the Vitruvian Man, whose drawing of ideal human proportions has become an enduring icon of the union between art and science; beyond painting, he filled thousands of notebook pages with mirror‑written notes and diagrams covering anatomy, astronomy, botany, geology, hydrodynamics, optics, mechanics, and urban planning, making meticulous dissections of human and animal bodies, designing ideal cities, and exploring how light, perspective, and emotion could be rendered more realistically in art; he conceptualized flying machines, armored vehicles, complex hydraulic systems, bridges, and various measuring and manufacturing devices centuries before technology caught up, leading modern commentators to call him a visionary engineer as well as the “father” of several scientific subfields, even though most of his designs were never constructed in his lifetime; historians and encyclopedias consistently describe him as one of the greatest painters in Western art and one of the most diversely talented individuals ever known, whose synthesis of observation, imagination, and experiment helped define what we now mean by “Renaissance man”; Cause of Death: Died at Clos Lucé (Cloux), near the royal Château d’Amboise in France, on 2 May 1519, with modern biographers and the principal encyclopedic sources agreeing that he succumbed at age 67, most likely to a stroke after earlier episodes of illness and partial paralysis in his right hand.