Britain’s Prince Philip, Queen Elizabeth the II’s husband has died today at the age of 99. The Prince married Princess Elizabeth in 1947, five years before she became Queen, and was the longest-serving royal consort in British history. In March, the Duke of Edinburgh left hospital after a month-long stay for treatment.

Philip spent 65 years supporting the queen, retiring from his public role in 2017 and staying largely out of the view since. In his active years, he helped set a new course for the monarchy under a young queen, championing Britain itself, as well as environmental causes, science and technology.