end. Eight large murals on the exterior of the stadium were installed, each depicting four Arsenal legends linking arms, such that the effect of the completed design is 32 legends in a huddle embracing the stadium: Around the lower concourse of the stadium are additional murals depicting 12 "greatest moments" in Arsenal history, voted for by a poll on the club's website. Prior to the start of the 2010–11 season, Arsenal renamed the coloured seating quadrants of the ground as the East Stand, West Stand, North Bank, and Clock End. Akin to Highbury, this involved the installation of a clock above the newly renamed Clock End which was unveiled in a league match against Blackpool. In April 2011, Arsenal renamed two bridges near the stadium in honour of club directors Ken Friar and Danny Fiszman. As part of the club's 125 anniversary celebrations in December 2011, Arsenal unveiled three statues of former captain Tony Adams, record goalscorer Thierry Henry and manager Herbert Chapman outside of the stadium. Before Arsenal's match against Sunderland in February 2014, the club unveiled a statue of former striker Dennis Bergkamp, outside the west stand of Emirates Stadium. Banners and flags, often designed by supporters group REDaction, are hung around the ground. A large "49" flag, representing the record run of 49 unbeaten league games, is passed around the lower tier before kick off. Structure and facilities Described as "beautiful" and "intimidating" by architect Christopher Lee of Populous, the Emirates Stadium is a four-tiered bowl with translucent polycarbonate roofing over the stands, but not over the pitch. The underside is clad with metallic panels and the roof is supported by four triangular trusses, made of welded tubular steel. Two trusses span in a north–south direction while a further two span an east–west direction. The trusses are supported by the stadium's vertical concrete cores, eight of which connected to them by steel tripods. They in turn each house four stairways, a passenger lift as well as service access. Façades are either glazed or woven between the cores which allows visitors on the podium to see inside the stadium. The glass and steel construction was devised by Populous to give an impression that the stadium sparkles in sunlight and glows in the night. The upper and lower parts of the stadium feature standard seating. The stadium has two levels below ground that house its support facilities such as