Complex sentence: The state religion of the empire was polytheistic, worshiping a diverse pantheon that included dozens of deities, many of them having the devotion of an officially recognized cult large enough to be represented in the central temple precinct of the capital Tenochtitlan.
Split into simpler sentences: The state religion of the empire was polytheistic, worshiping a diverse pantheon that included dozens of deities. Many had officially recognized cults large enough so that the deity was represented in the central temple precinct of the capital Tenochtitlan.