(1632-1723) one of the most famous English architects, known especially for designing the present St Paul's Cathedral (where he is buried) and other churches in London that replaced those destroyed in the Great Fire of London. Among other buildings he designed are Chelsea Hospital, Marlborough House, the Royal Naval College and parts of Hampton Court. His buildings combined the baroque style with the classical style. He was also a scientist and astronomer (= person who studies the stars, planets, etc.) and one of the group of people who established the Royal Society. He was made a knight in 1673.