That Byin Nyu Temple was built in the mid-12th century during the reign of King Alaungsithu. Adjacent to Ananda Temple, it is the tallest structure in Bagan. “Thatbyinnyu” means “omniscience”, which the Buddha is said to have attained upon enlightenment. Feel free to explore some of the run-down temples nearby That Byin Nyu as well, and an old city wall that is a walk away.