 In line with ancient Egyptian tradition, she was also named "adelphe" (= sister) of Ptolemy V. A synod of priests held at Memphis in 185 BC transferred all honours that Ptolemy V had received in 196 BC (written on the Rosetta stone) to his wife.In 187 BC, Cleopatra I was appointed vizier.Upon her husband's death in 180 BC, she ruled on behalf of her young son, Ptolemy VI.