It has 3 mihrabs

Most mosques only have one mihrab, but the Prophet's ṣallallāhu 'alayhi wa sallam (peace and blessings of Allāh be upon him) mosque has three. The current mihrab is the one used nowadays for the imam to lead prayers. The next mihrab is set back and is called the Suleymaniye or Ahnaf mihrab. It was made on the orders of the Sultan Suleyman the magnificent for the Hanafi imam to lead prayers whilst the Maliki imam lead prayers from the Prophetic mihrab. The Prophetic mihrab completely covers the area that the Prophet ṣallallāhu 'alayhi wa sallam (peace and blessings of Allāh be upon him) used to lead prayers from except where he placed his feet.