Al-Azhar’s Grand Imam Ahmed Al-Tayyeb met Friday night with Saudi King Salman in Cairo to discuss combating extremism and promoting “centrist Islam,” state news agency MENA reported.

Al-Tayyeb, the head of the world's oldest Islamic Sunni institution, described the king’s five-day visit to Egypt as “historic.”

Earlier Friday evening, the Saudi monarch met with Egypt's Coptic Orthodox Pope Tawadros in a first meeting of its kind.

Salman, who arrived in Cairo Friday, has signed a number of economic accords, including the framework for a number of loans signed in March, worth over $20 billion.

The king is expected to give a speech in front of Egypt's parliament Sunday.