Architectural conservation is a new cultural phenomenon in Western civilization. It was initiated as an emotional concept in Athens charter in 1931, classified as a cultural phenomenon after the Second World War and partly rationalized in the sixties of the twentieth century. But it is a very old, original and rational phenomenon in Islamic civilization, born in the uterus of its shari'a الشريعة (Islamic legislation) and associated with the philosophy of Islamic history, particularly with the concept of historical continuity. Architectural conservation participates in keeping the vocabulary of the architectural and urban fabrics of Arabic and Islamic cities running, operating and functioning proper. It activates, enhances and sustains investment in Arabic and Islamic cities. It integrates, complement and not contradict economic development in Arabic Islamic Cities.