On June 8, 2023, King Philippe and Queen Mathilde attended the Chelsea Pensioners annual Founder's Day Parade at the Royal Hospital Chelsea in London. As the day's Guest of Honour, the King of Belgium was invited to review the parade of Chelsea Pensioners. The Royal Hospital Chelsea is a retirement home and nursing home for some 300 veterans of the British Army. King Charles II founded the Royal Hospital as a retreat for veterans in 1682.