Academician of the Latvian Academy of Science (LAS), Professor Jānis Stradiņš has passed away on November 29, 2019, at the age of 85.He was born on December 10, 1933, in Riga, into the family of surgeon Pauls Stradiņš and his wife, physiotherapist Nina Stradiņš.His work—activities in the history of sciences—started in 1958. Jānis Stradiņš became the secretary of the Association of the History of Natural Sciences and Technology. In 1968, he became its vice president, and from 1987 until 1992 he served as the president of the association. Following the early period of Latvia’s newly gained independence, the association changed its name and since 1992 is called the Latvian Association of the History of Science. The academician headed the association until 2015 and since 2002 was its honorary member.