José Gregorio Hernández Cisneros was born on 26 October 1864 in Isnotú, a small village in the Andean state of Trujillo, Venezuela, the first of six children of Benigno María Hernández y Manzaneda and Josefa Antonia Cisneros y Mansilla. His mother, of Spanish descent and related to the famed Cardinal Cisneros, formed him in a fervent faith; she died when he was eight. Baptized on 30 January 1865 and confirmed on 6 December 1867 by Bishop Juan Hilario Bosset Castillo of Mérida, he spent his childhood in Isnotú, where his father sold pharmaceuticals and livestock.
At thirteen he wished to study law, but was persuaded toward medicine. In 1878 he made the difficult journey from the Andes to Caracas, entered the prestigious Colegio Villegas, and in 1882 earned a baccalaureate in philosophy. He then studied medicine at the Central University of Venezuela, graduating as a physician on 28 June 1888 with outstanding academic performance and conduct. The Venezuelan government granted him a scholarship for further study in Europe. In Paris he worked in Mathias Duval's histology laboratory and deepened his knowledge of bacteriology, pathology, microbiology, histology, and experimental physiology; he later studied in Berlin. Colleagues noted his skill and moral rectitude: while others pursued the pleasures of the Belle Époque, he lived soberly and religiously.
Returning in 1891, he became professor of normal and pathological histology, experimental physiology, and bacteriology at the Central University of Venezuela and a leading physician at Hospital José María Vargas. With state funds he acquired microscopes and laboratory equipment from France, founded the Laboratory of Experimental Physiology in Caracas, and introduced modern experimental methods and Virchow's cellular theory. He is credited with founding the first bacteriology office in the Americas and publishing Elements of Bacteriology (1906). He co-founded the National Academy of Medicine (1904), described a form of angina pectoris of malarial origin, taught generations of Venezuelan researchers, and wrote scientific papers and works of philosophy. He spoke French, German, English, Italian, Portuguese, and Latin, and was also a musician and theologian of solid formation.
A devout Catholic, he made profession in the Third Order of Saint Francis on 7 December 1899 and lived with increasing poverty and asceticism, attending daily Mass, beginning every task with prayer, and giving free time to prayer and the care of the poor. He treated the indigent without charge and often paid for their medicines himself. Desiring a more radical consecration, he entered the Charterhouse of Farneta near Lucca, Italy, on 16 July 1908, but fragile health forced him to leave on 21 April 1909. In 1913 he enrolled as a seminarian at the Pontifical Latin American College in Rome with his sister Isolina, yet pulmonary illness again obliged his return. He thereafter lived his vocation as a lay Franciscan tertiary among his patients. During the Spanish flu of 1918 he cared for the stricken in Caracas.
On 29 June 1919, after buying medicine at a pharmacy for a poor patient he regularly visited, he was struck by a motor vehicle. Carried to hospital, he received the last sacraments and died after murmuring, "O Holy Virgin!" The people cried that a saint had died. His funeral drew civil, scientific, and religious authorities and thousands of mourners; he was buried in the Church of La Candelaria in Caracas, where his major relics are still venerated. From the moment of his death Venezuelans sought his intercession; his tomb became a place of pilgrimage. The cause for beatification opened in 1949; he was declared Venerable in 1986. Pope Francis recognized a miracle—the recovery of a girl shot in the head—and he was beatified on 30 April 2021 in Caracas. Canonization was approved in 2025; on 19 October 2025 Pope Leo XIV canonized him in Saint Peter's Square together with Carmen Elena Rendiles Martínez, the first saints of Venezuela.
May Saint José Gregorio Hernández intercede for us, and let us imitate today his merciful charity toward the sick and the poor.
