Arena on Geonosis
There are three columnes with chains, a entrance gate, a piece of the tribunes and the terrace of Poggle The Lesser and Dooku.
The columnes can turn around and be overthrown, the terrace and the tribune can be removed, and the back and the top of the terrace can be opened.
Here you can see the functions of the Terrace and the collumnes.
this minifigures could be included:
2 Clone Trooper