Complex sentence: He rebuilt the important temple of Re-Atum in Heliopolis, the centre of the sun cult--and erected 2 red granite obelisks there to celebrate his Year 30 Heb Sed Jubilee.
Split into simpler sentences: He rebuilt the important temple of Re-Atum in Heliopolis which was the centre of the sun cult & ndash. He erected 2 red granite obelisks there to celebrate his Year 30 Heb Sed Jubilee.