Stylobate

Triple-stepped crepidoma with stylobate at top, in the Doric Temple of Segesta, Sicily
The Roman Maison Carrée, Nîmes, illustrating the Roman version of a stylobate.
Use stylobate compared with Doric, Tuscan, Ionic, Corinthian and Composite orders

In classical Greek architecture, a stylobate (Greek: στυλοβάτης) is the top step of the crepidoma, the stepped platform upon which colonnades of temple columns are placed (it is the floor of the temple). The platform was built on a leveling course that flattened out the ground immediately beneath the temple.