Medievieal Fortress.zip is a release file of the Minecraft map Medieval Fortress Mojang Builds, made for Minecraft 1.11, 1.11.1, 1.11.2. It was published on February 25, 2017 and is 3.8 MB in size. For the full description, screenshots and every other version, visit the Medieval Fortress Mojang Builds map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.