Lion of Night
According to tales told by the priestly scribes of Yin, the Lion of Night fathered a son on the Maiden-Made-of-Light. This son was the God-on-Earth, who ruled the Great Empire of the Dawn for ten thousand years, before ascending to the heavens. The descendants of the God-on-Earth ruled the empire after him, each ruling a shorter time than the previous one, until the brother of the Amethyst Empress usurped her in the Blood Betrayal and crowned himself as the Bloodstone Emperor, ushering in the Long Night. The Maiden-Made-of-Light turned her back upon the world, and the Lion of Night came forth in all his wroth to punish the wickedness of man.
The Five Forts, which predate the Golden Empire of Yi Ti, are claimed by some to have been raised by the Pearl Emperor of the Great Empire of the Dawn, to keep the Lion of Night and his demons away from the realms of men.
The Faceless Men believe that the Lion of Night is one of the many aspects of the Many-Faced God. In the House of Black and White in Braavos, there are statues of thirty different gods, including one of the Lion of Night. Worshippers come to light candles by each statue. The shrine of the Lion of Night is most commonly visited by rich men.