CAIRO — Islamist Mohammed Morsi promised a "new Egypt" as he took the oath of office Saturday to become the country's first freely elected president, succeeding Hosni Mubarak who was ousted 16 months ago.

At his inauguration before the Supreme Constitutional Court, Morsi also became the Arab world's first freely elected Islamist president and Egypt's fifth head of state since the overthrow of the monarchy some 60 years ago.

He took the oath before the court's 18 black-robed judges in its Nile-side seat built to resemble an ancient Egyptian temple.