Hong Taiji created the Qing ancestral cult in 1636 when he assumed the title of emperor. Taking the Chinese imperial cult as a model, he named his main paternal ancestors "kings" and built an Imperial Ancestral Temple in his capital Mukden to offer sacrifices to them. When the Qing took control of Beijing in 1644, Prince Regent Dorgon had the Aisin Gioro ancestral tablets installed in what had been the Ming ancestral temple. In 1648 the Qing government bestowed the title of "emperor" to these ancestors and gave them the honorific posthumous names and temple names by which they were known for the rest of the dynasty. Nurhaci was identified retrospectively as Taizu ("grand progenitor"), the usual name given to a dynasty's first emperor. This is why Nurhaci is considered as the first Qing ruler even if he was never emperor in his lifetime. Taizong was the usual name for the second emperor of a dynasty, and so Hong Taiji was canonized as Qing Taizong. The last emperor of a dynasty usually did not receive a temple name because his descendants were no longer in power when he died, and thus could not perpetuate the ancestral cult. Puyi, the last Qing monarch, reigned as the Xuantong Emperor from 1908 to 1912, but did not receive a temple name.