Other forms: plinths
If a building has columns, you can call the platform or base on which a column rests a plinth. The plinth typically lies between the column and the ground.
In architecture, a plinth is one of the basic building elements. While it's most common for a plinth to support a pillar or column, it can also be used as a base or slab underneath a statue, a bust, or a decorative vase, and in engineering a plinth is the support for a dam. The word comes from the Greek root plinthos, "brick" or "squared stone."