This is a working institution. It is in a superb building by Barry and Pugin with medieval survival, (Westminster Hall). For entrance to the House of Commons or House of Lords public galleries during debates, queue outside St Stephen's entrance when parliament is in session. Advance bookings for Prime Minister's Question Time can be made by applying in writing to your MP well in advance. Tours of the building need to be booked in advance through relevant local MP. Overseas visitors can arrange tours through Summer Opening.