Stuart and Hanoverian), and between them there are windows stained with the arms of the early aristocratic families of England. Of the doorways, the one to the south—which leads into the Lords Chamber—is the most magnificent, and sports much gilding and decoration, including the full royal arms. It is enclosed by the Brass Gates, a pair of elaborately pierced and studded doors together weighing 1.5 tonnes. The side doors, which feature clocks, open into corridors: to the east extends the Law Lords Corridor, which leads to the libraries, and nearby to the west lies the Moses Room, used for Grand Committees. To the north is the vaulted Peers' Corridor, which is decorated with eight murals by Charles West Cope depicting historical scenes from the period around the English Civil War. The frescoes were executed between 1856 and 1866, and each scene was "specifically chosen to depict the struggles through which national liberties were won". Examples include Speaker Lenthall Asserting the Privileges of the Commons Against Charles I when the Attempt was Made to Seize the Five Members, representing resistance against absolute rule, and The Embarkation of the Pilgrim Fathers for New England, which illustrates the principle of freedom of worship. Central Lobby Originally named "Octagon Hall" because of its shape, the Central Lobby is the heart of the Palace of Westminster. It lies directly below the Central Tower and forms a busy crossroads between the House of Lords to the south, the House of Commons to the north, St Stephen's Hall and the public entrance to the west, and the Lower Waiting Hall and the libraries to the east. Its location halfway between the two debating chambers has led constitutional theorist Erskine May to describe the Lobby as "the political centre of the British Empire", and allows a person standing under the great chandelier to see both the Royal Throne and the Speaker's Chair, provided that all the intervening doors are open. Constituents may meet their Members of Parliament here, even without an appointment, and this practice is the origin of the term lobbying. The hall is also the theatre of the Speaker's Procession, which passes from here on its way to the Commons Chamber before every sitting of the House. The Central Lobby measures across and from the floor to the centre of the vaulted ceiling. The panels between the vault's ribs are covered with Venetian glass mosaic displaying