The most renowned serapeum was in Alexandria. Under Ptolemy I Soter, efforts were made to integrate Egyptian religion with that of their Hellenic rulers. Ptolemy's policy was to find a deity that should win the reverence alike of both groups, despite the curses of the Egyptian priests against the gods of the other previous foreign rulers (e.g. Set, who was lauded by the Hyksos). Alexander the Great had attempted to use Amun for this purpose, but he was more prominent in Upper Egypt, and not as popular in Lower Egypt, where the Greeks had stronger influence.