Scientific and Cultural Organization (UNESCO) classifies the Palace of Westminster, along with neighbouring Westminster Abbey and St Margaret's, as a World Heritage Site. It is also a Grade I listed building. Although there is no casual access to the interior of the Palace, there are several ways to gain admittance. UK residents may obtain tickets from an MP for a place in the viewing ("strangers") gallery of the House of Commons, or from a Lord for a seat in the gallery of the House of Lords. It is also possible for both UK residents and overseas visitors to queue for admission to them at any time of the day or night when either House is in session, but capacity is limited and there is no guarantee of admission. Either House may exclude "strangers" if it desires to sit in private. Members of the public can also queue for a seat in a committee session, where admission is free and places cannot be booked, or they may visit the Parliamentary Archives for research purposes. Booking an appointment is necessary in the latter case, along with a proof of identity. Free guided tours of the Palace are held throughout the parliamentary session for UK residents, who can apply through their MP or a member of the House of Lords. The tours last about 75 minutes and include the state rooms, the chambers of the two Houses and Westminster Hall. Paid-for tours are available to both UK and overseas visitors during the summer recess and Saturdays throughout the year. Tours of the Elizabeth Tower have been suspended until 2021 while the tower undergoes refurbishment. Architectural historian Dan Cruickshank selected the Palace as one of his five choices for the 2006 BBC television documentary series Britain's Best Buildings. The nearest London Underground station is Westminster, on the District, Circle and Jubilee lines. In 2015, Parliament organised a year-long programme of events called "Parliament in the Making" to celebrate the 800th anniversary of the sealing of Magna Carta on 15 June, and the 750th anniversary of the first representative parliament on 20 January. Events were coordinated with Parliament Week. The BBC held events throughout the year including a "Democracy Day" on 20 January consisting of live discussions and debate in partnership with the Speaker's Office of the House of Commons, including broadcasts from inside the Palace of Westminster. See also Parliament of the United Kingdom