Athenaeum_v1.0.zip is a release file of the Minecraft map Athenaeum: Cascade Temple, made for Minecraft 1.5.1. It was published on April 16, 2013 and is 7.8 MB in size. For the full description, screenshots and every other version, visit the Athenaeum: Cascade Temple map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.