Complex sentence: The early Ptolemies did not disturb the religion or the customs of the Egyptians, and indeed built magnificent new temples for the Egyptian gods and soon adopted the outward display of the Pharaohs of old.
Split into simpler sentences: The early Ptolemies did not disturb the religion or the customs of the Egyptians. They built magnificent new temples for the Egyptian gods and soon adopted the outward display of the Pharaohs of old.