Jan Thiele is a PhD fellow at Freie Universität, Berlin Graduate School Muslim Cultures and Societies. He repeatedly traveled to Yemen over the past six years and published on rare or largely unknown manuscripts form Yemeni collections. His writings include Kausalität in der muʿtazilitischen Kosmologie. Das Kitāb al-Muʾaṯṯirāt wa-miftāḥ al-muškilātdes Zayditen al-Ḥasan ar-Raṣṣāṣ (st. 584/1188) (Leiden: Brill 2011).

http://fu-berlin.academia.edu/JanThiele

Preserving Yemen’s Cultural Heritage: The Yemen Manuscript Digitization Project, by Sabine Schmidtke & Jan Thiele, Sanaa: Botschaft der Bundesrepublik Deutschland und Deutsches Archäologisches Institut, 2011 (Hefte zur Kultugeschichte des Jemen Band 5).