Colosseum.zip is a release file of the Minecraft map Colosseum, made for Minecraft 1.7.10, 1.8. It was published on September 13, 2014 and is 0.6 MB in size. For the full description, screenshots and every other version, visit the Colosseum map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.
