Complex sentence: Ali Bardakoğlu is the current president Diyanet İşleri Başkanlığı (Presidency of Religious Affairs) and as such the highest Islamic authority in Turkey.
Split into simpler sentences: Ali Bardakoğlu is the current president of Religious Affairs of Turkey, also known as Diyanet İşleri Başkanlığı in Turkish. The president of this institution is the highest Islamic authority in Turkey.