Shihab al-Din
The founder's nephew Shihab al-Din Abu Hafs Umar Suhrawardi, author of "Awarif ul-Maarif", ("The Knowledge of the Spiritually Learned"), renounced reclusiveness and austerity in favour of an active life in society, maintaining close contact with the civil authorities and undertaking diplomatic missions and the political settlement of conflicts. His luxurious cloister in Baghdad, with gardens and bath houses, was built for him by Caliph an-Nasir.