Az-Zahir or Al-Dhahir (1175 – 11 July 1226) (Arabic: الظاهر بأمر الله, romanized: Aẓ-Ẓāhir bi-Amr Allāh | in full: أبو النصر محمد الظاهر بأمر الله بن أحمد الناصر) was the Abbasid Caliph in Baghdad from 1225 to 1226. He succeeded his father Caliph Al-Nasir in the year 1225 as the thirty-fifth Abbasid Caliph.