What kind of architectural model was this in ancient times?

The three halls of the Forbidden City: Hall of Supreme Harmony, Hall of Zhonghe and Hall of Baohe.

The three halls of the Forbidden City refer to the three halls of Taihe, Zhonghe and Baohe. This is the palace used by feudal emperors when they exercised their power or held grand ceremonies.

The Three Great Halls are palace buildings in China during the Ming and Qing Dynasties, which reflect the following characteristics of China Palace: the main hall (Hall of Supreme Harmony) is used in the plane layout, and the halls, pavilions, terraces, corridors, pavilions, doors and other buildings are arranged in a symmetrical French way.

The palace building is supported by a wooden frame, with a stone pillar foundation under each column, brick walls for maintenance on the north, west and east, facing south, and covered with a golden glazed tile roof.

Palace decoration color, the roof is mostly golden yellow, columns, doors, windows, walls and other places are mostly red decoration, eaves are mostly painted with blue, blue and green, lined with white jade stone railings and stone steps, forming a bright color contrast.