Bayun Pagoda, Ancient brick tower in Zhouzhi County, China

Bayun Pagoda, also called Ruiguang Pagoda, is a square brick-and-wood dense-eave pagoda in the southwest of Zhouzhi County, Xi'an, Shaanxi. It stands 36 metres high with a base side of 9 metres; of its original thirteen storeys, eleven remain.

Bayun Pagoda was first built in 708, the second year of the Jinglong era of the Tang dynasty. It is a brick-and-wood dense-eave pagoda with a square plan, originally of thirteen storeys, of which eleven remain at a height of 36 metres and a base side of 9 metres. In 2001 it was listed in the fifth batch of Major Historical and Cultural Sites Protected at the National Level.

The pagoda is also called Rui Guang Pagoda, a name recorded alongside Bayun Pagoda in local usage. It stands in the southwest of Zhouzhi County town, where it has long served as a landmark of the county seat. Its dense-eave form, with closely stacked eaves on a square plan, is the feature visitors notice first.

Bayun Pagoda stands in the southwest of Zhouzhi County town, in Xi'an, Shaanxi, and is reached by local roads from the county centre. The site is a protected national relic, so access is on foot around the tower rather than inside it. Check opening conditions locally before travelling, as the tower is not a staffed visitor attraction.

The pagoda was originally built with thirteen storeys, but only eleven survive today, giving it a height of 36 metres on a square base 9 metres on each side. It is also known as the Ruiguang Pagoda, a name visitors rarely hear.