Whirling dervishes perform outside the Byzantine-era Hagia Sophia mosque in Istanbul, Turkey, Saturday, Sept. 30, 2023, to mark the 750th anniversary of the death of Sufi mystic poet known as Rumi or Mevlana. The 13th-century poet Mevlana Jalal al-Din al-Rumi is considered to be the father of Sufism, and his death is considered in Sufism to be his reunion with God. (AP Photo/Khalil Hamra)