What defines Roman Doric columns compared to Greek Doric columns?

Roman Doric columns are characterized by their fluted shafts that are supported by a base, which distinguishes them from Greek Doric columns. Greek Doric columns typically do not have a base; instead, they rest directly on the stylobate, which is the upper step of a temple platform. The introduction of a base in Roman Doric columns adds a more pronounced and structured profile to the column, contributing to the overall aesthetic of Roman architecture.

In addition, Roman Doric columns maintain the fluted design found in Greek Doric columns, but the presence of the base is a significant architectural feature that marks the evolution of column design from Greek to Roman traditions. This transition represents a broader trend in Roman architecture, where such details were often emphasized for enhancement and grandeur.

The other options, such as the presence of an ornate capital, the absence of a base, and the use of colorful stones, do not specifically define Roman Doric columns. Roman Doric columns, while they may feature variations in capitals and choices of material, are fundamentally distinguished by the addition of a base to the fluted shaft.