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.[2] Temple II was built by the king Jasaw Chan K'awiil I in honour of his wife, Lady Kalajuun Une' Mo'.[3] 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.[4] 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.[5] In fact her son Yik'in Chan K'awiil oversaw the completion of Temple II when he became king.[6]