Sculpture by Audrey Flack at Parque das Nações, Lisbon
Princess Catherine of Braganza (1638-1705), Portuguese King John IV's daughter, became queen when she married King Charles II of England. She was not a particularly popular choice of queen since she was a Roman Catholic, which prevented her from being crowned. Catherine is credited with the introdution of tea drinking to Britain.
Do read this interesting article on the controversy regarding her statue in Queens,