To which dynasty do the ancient roof tiles and eave styles of Pingyao Ancient City belong? What kind of traditional decorative patterns are used on them?

1. The Pingyao Ancient City we see is the result of the expansion of the Ming Dynasty, while the ancient dwellings of Pingyao are mainly brick-walled and tile-roofed courtyards built in the Qing Dynasty, with only a few rare and precious old dwellings from the Yuan Dynasty. Its architecture conforms to the traditional architectural patterns of the northern Han ethnic areas, but also has distinctive local characteristics.

So I think it should be the style of the Ming and Qing Dynasties.

2. As for the decoration, it seems to be a dragon.