The City of Legends, Metru Nui was a great metropolis. Resting in a sea of liquid protodermis, the city and was widely known for its quality of craftsmanship and high standards.
Like Mata Nui after it, Metru Nui was divided into six districts. Po-Metru, where large areas were set aside for manufacturing and sculpting; Ga-Metru, with temples and halls of learning; Ta-Metru, with its great hot forges and mask-makers; Onu-Metru and its extensive archives; Le-Metru holding the transportation facilities; and Ko-Metru with its Knowledge Towers. The massive Coliseum at the center of the island city hosted sporting events and other public exhibitions.
For thousands of years, the city was prosperous, defended by legions of Toa and ruled by wise Turaga. But that peace came to an end after Makuta infiltrated the city and posed as Turaga Dume. He rid the city of Toa and had the Matoran put into pods, which later found their way to the island of Mata Nui.
A great quake shook the city, toppling towers and causing much damage. Later, spidery Visorak hordes invaded the city, casting webs throughout the tall towers and further harming the once-great metropolis. After the Toa Metru left, the city was abandoned until the Toa Nuva returned with Takanuva to rebuild.
Hardly had the rebuilding started when the Toa were sent on missions of vital importance, casting the future of Metru Nui into uncertainty once again…