In 1971 she received her doctorate with distinction from the University of Hamburg on the subject of “al-Nasir” (1225–1180).

This work examines the history of Islam in the Middle Ages through the Caliphate and religious-political currents in Baghdad.

The subject of this work was the revival of the Arabic and analytical version of the relationship between Orthodoxy and Islamic philosophy entitled: Rasef Omar Al-Sahrvardi on the advice of al-Aymaniyah and Kasf al-Fadaih al-Ayunaniyah.

[1] In 1986/1987 Hartman held the chair for Oriental Studies at Saarland University.

Her main research areas were the cultural history of Islam in the Middle Ages, Arabic and Persian mysticism, theology and concepts of power, Islamism and civil society, and educational consulting.