The tallest building in all of Metru Nui, the Coliseum sits squarely in the center of the city at the point where all six metro meet. It is well known as a sports arena, but it is also home to Turaga Dume’s chambers, large storage areas, and the city’s power plant. The Coliseum is the site of all city-wide assemblies, including Matoran naming ceremonies and grand akilini tournaments. Different types of Vahki take turns guarding the Coliseum. Currently, Vahki Zadakh and Vahki Rorzakh have been sharing duties there.