Civilisation Building for Tigris and Euphrates

The 1997 edition of Tigris and Euphrates does not yet include the Civilisation buildings. Hereby a design, inspired by Golob's Ziggurat (https://www.thingiverse.com/thing:3374223) that provides civilisation buildings.

Place a colored block in the cavity at the top to mark the color.

Print four of them for the complete game.