In the centre of the quad is the Harris Building, formerly Oriel court, a real tennis court where Charles I played tennis with his nephew Prince Rupert in December 1642 and King Edward VII had his first tennis lesson in 1859. The building was in use as a lecture hall by 1923, and after modernisation between 1991 and 1994, funded by Sir Philip and Lady Harris, contains accommodation, a seminar room and the college's main lecture theatre. The bronze plaque in the lobby commemorates his father, Captain Charles William Harris, after whom the building is named. The building was opened by John Major, then Prime Minister, on 10 August 1993.