This architectural style is defined by the use of slopes in “apron” form that rest upon a short incline. The corners of the bases or plinths are rounded, tucked-in or inverted, which gives the floor the form of a star. These bases are crowned with temples with thick openings and heavy crests. Likewise, the staircases, commonly without ridges, are monolithic and they are flanked by stucco figureheads that are either anthropomorphic or zoomorphic. It is a style characteristic of the sites of the late Pre-Classic period (300 BC – 250 AD) and the early Classic period (250 – 600 AD).