Mazu, also known by several other names and titles, is a Chinese sea goddess, the deified form of the historical Lin Mo or Lin Moniang, a Fujianese shamaness traditionally dated to c. 960 – c. 987. Revered after her death as a patron of seafarers, including fishermen and sailors, her worship spread throughout China's coastal regions and expatriate communities throughout Southeast Asia. She was thought to roam the seas, protecting her believers through miraculous interventions. She is now generally regarded by her believers as a powerful and benevolent Queen of Heaven, a role in which she is sometimes syncretized with similar figures, such as Guanyin and the Virgin Mary. Mazuism is most popular on Taiwan; her temple festival is a major event throughout the country, with the largest celebrations around her temples at Dajia and Beigang. It is a notionally illegal cult in the People's Republic of China but is broadly tolerated and sometimes conflated with approved Taoist beliefs.