Passage: The next ruler was K'ak' Yipyaj Chan K'awiil, a son of K'ak' Joplaj Chan K'awiil. The early period of his rulership fell within Copán's hiatus, but later on he began a programme of renewal in an effort to recover from the city's earlier disaster. He built a new version of Temple 26, with the Hieroglyphic Stairway being reinstalled on the new stairway and doubled in length. Five life-size statues of seated rulers were installed seated upon the stairway. K'ak' Yipyaj Chan K'awiil died in the early 760s and is likely to have been interred in Temple 11, although the tomb has not yet been excavated.Yax Pasaj Chan Yopaat was the next ruler, 16th in the dynasty founded by K'inich Yax K'uk' Mo', although he appears not to have been a direct descendent of his predecessor. He took the throne in June 763 and may have been only 9 years old. He produced no monumental stelae and instead dedicated hieroglyphic texts incorporated into the city's architecture and smaller altars. Texts make an obscure reference to his father but his mother was a noblewoman from distant Palenque in Mexico. He built the platform of Temple 11 over the tomb of the previous king in AD 769 and added a two-storey superstructure that was finished in AD 773. Around AD 776, he completed the final version of Temple 16 over the tomb of the founder. At the base of the temple, he placed the famous Altar Q, which shows each of the 16 rulers of the city from K'inich Yax K'uk' Mo' through to Yax Pasaj Chan Yopaat, with a hieroglyphic text on top describing the founding of the dynasty. By the latter 8th century, the nobility had become more powerful, raising palaces with hieroglyphic benches that were as richly constructed as those of the king. At the same time, local satellites were displaying their own local power, as demonstrated by the ruler of Los Higos erecting his own stela in AD 781. Towards the end of Yax Pasaj Chan Yopaat's reign, the city of Copán was struggling with overpopulation and a lack of local resources, with a distinct fall in living...

Question: How many rulers was showes when he placed the Altar Q at the base of the temple?
16