Saadya Gaon’s anti-Qaraite polemic was fundamental for the development of Qaraite literature. In their turn, Qaraites quoted Saadya and discussed his views so much that their treatises can now be used to reconstruct Saadya’s lost works. This workshop explores anew the inextricable connection between Saadya and the Qaraites by looking at a wide range of previously little studied Qaraite sources from the 10th-11th centuries.