Coliseum (OU)

The Coliseum was a gigantic building located at the heart of Metru Nui from which the city was ruled.

Description
The Coliseum was a gigantic, somewhat cone-shaped building that was located at the center of Metru Nui. Like everything else in the Matoran Universe, the Coliseum was made of protodermis. It was usually where the current ruler of Metru Nui resided, but it also served as a place where the ruler of the city could make major announcements to the Matoran via telescreens. The Coliseum contained an arena that was large enough to accommodate every Matoran in the city for this purpose. For these reasons and more, the Coliseum was regarded as a cultural icon by the Matoran.

The Coliseum was critically important to the continued operation of Mata Nui and the Matoran Universe because it contained the power plant that produced energy for the entirety of Metru Nui, which functioned as Mata Nui's brain. If this power plant was deactivated or destroyed, the power supply to the rest of Metru Nui would be cut and Mata Nui would be endangered.

History
The Coliseum was built by the Matoran according to the Great Beings' specifications during the construction of the Matoran Universe.

In 99,080 CMT, Turaga Dume held a ceremony at the Coliseum to reward everyone who participated in the Quest for the Master Sword for their efforts. He gave a speech and handed out medals to the quest participants, but Blackout interrupted the ceremony to steal the Master Sword from Zev Raregroove.

In 100,080 CMT, Blackout took over the Matoran Universe, brainwashed its Matoran, and ordered them to dismantle all of its buildings and use the materials to build Darkmount. It is entirely possible that the Coliseum was dismantled as a result of this order, but there is no surviving evidence to confirm it.