Which architectural feature typically marks the apex of gabled roofs in Greek architecture?

The architectural feature that typically marks the apex of gabled roofs in Greek architecture is known as the pediment. A pediment is the triangular section that sits above the entablature and is often filled with sculpture or decorative elements. It serves both a structural and aesthetic role, providing a natural termination to the gabled roof while also enhancing the visual impact of the temple or building.

The acroterion, while a decorative feature placed on the roof, specifically refers to objects or sculptures that are placed on the pedestal at the corners or peak of the pediment, not the apex itself. The frieze is a horizontal band that runs along the upper part of the wall, often decorated with reliefs, but it does not define the topmost point of a gabled roof. The architrave is the lowest part of the entablature, located just above the columns, and serves a different structural role, not related to the gable's apex.