Tikal Temple II (or the Temple of the Masks, alternatively labelled by archaeologists as Tikal Structure 5D-2) is a Mesoamerican pyramid at the Maya archaeological site of Tikal in the Petén Department of northern Guatemala. The temple was built in the Late Classic Period in a style reminiscent of the Early Classic. Temple II is located on the west side of the Great Plaza, opposite Temple I. Temple II was built by the king Jasaw Chan K'awiil I in honour of his wife, Lady Kalajuun Une' Mo'. Temple II had a single wooden sculpted lintel that bears the portrait of a royal woman who may have been the wife of Jasaw Chan K'awiil I, who was entombed beneath Temple I. Lady Kalajuun Une' Mo', whose name means "Twelve Macaw Tails", was also important for being the mother of Jasaw Chan K'awill I's heir.