People attend the first prayers at Hagia Sophia in Istanbul, Turkey, on July 24, 2020. Thousands of Turkish people on Friday attended the first prayers at Istanbul's Hagia Sophia after it has been transformed into a mosque once again. (Xinhua)

People attend the prayers outside Hagia Sophia in Istanbul, Turkey, on July 24, 2020. Thousands of Turkish people on Friday attended the first prayers at Istanbul's Hagia Sophia after it has been transformed into a mosque once again. (Xinhua)

People attend the first prayers at Hagia Sophia in Istanbul, Turkey, on July 24, 2020. Thousands of Turkish people on Friday attended the first prayers at Istanbul's Hagia Sophia after it has been transformed into a mosque once again. (Xinhua)

People attend the first prayers at Hagia Sophia in Istanbul, Turkey, on July 24, 2020. Thousands of Turkish people on Friday attended the first prayers at Istanbul's Hagia Sophia after it has been transformed into a mosque once again. (Xinhua)

Turkish President Recep Tayyip Erdogan (R, Front) attends the prayers at Hagia Sophia in Istanbul, Turkey, on July 24, 2020. Thousands of Turkish people on Friday attended the first prayers at Istanbul's Hagia Sophia after it has been transformed into a mosque once again. (Xinhua)

Turkish President Recep Tayyip Erdogan (C, Front) attends the first prayers at Hagia Sophia in Istanbul, Turkey, on July 24, 2020. Thousands of Turkish people on Friday attended the first prayers at Istanbul's Hagia Sophia after it has been transformed into a mosque once again. (Xinhua)