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Emperors Titus and Claudius were noted for shouting at the gladiators From Their seats in the colosseum. The scene of all the action --the sanded arena floor-- was also eye-catching. It was often landscaped with rocks and trees to resemble exotic locations during the staging of wild animal hunts (venatiories).
The Ultimate Guide. The Colosseum was built of blocks of travertine stone extracted from the quarries of Albulae near Tivoli and brought to Rome by a wide road specially constructed for the purpose. The amphitheater forms an oval 527 meters (1,729) in circumference with diameters of 189 and 156 meters (615 and 510 ft). The height of the four-storied wall is 48 meters (157 ft).