An entablature is a horizontal structure found in classical architecture, typically situated above columns. It consists of three main parts: the architrave, which is the lowest section, the frieze in the middle, and the cornice at the top. This design serves both decorative and structural purposes, providing support for the roof or upper elements of a building. Entablatures are commonly seen in structures influenced by ancient Greek and Roman styles, such as temples and public buildings. They often feature intricate carvings and reliefs, enhancing the aesthetic appeal of the architecture. Notable examples can be found in the works of architects like Ictinus and Callicrates, who designed the Parthenon.