A series of arches on column, pier, or pillars. Also, a roofed passageway or gallery, especially with shops on one or both sides. Only in the last century has arcade also come to refer to commercial establishments featuring rows of coin-operated games.Examples: Roman, Rome, Colosseum (Flavian Amphitheater), 70-82 CE. A vast ellipse in plan, length 620 feet x width 513 feet (188 x 156 m), with eighty external arcaded openings on each storey, those on the ground floor forming entrances from which the various tiers of seats were reached. see thumbnail to rightSee a cutaway view. The upper storey was added 222-224, around the top of which were sockets for 240 wooden masts which carried a massive canopy (velarium). The fa?ade's entire height is 157 feet 6 inches (48.5 m). Each of the four storeys are pierced by arches, and have attached three-quarter columns and entablatures, Doric in the first story, Ionic in the second, Corinthian in the third, and above these are pilasters of Corinthian design, with small square window openings in alternate bays. Another view of the Colosseum.