The present paper focuses on the commentaries attributed to the Indian Yog?c?ra scholar Sthiramati. So far Sthiramati’s work has received far less attention from modern scholars than the texts of other Yog?c?ra authors like Asa?ga or Vasubandhu, possibly because of the erroneous view that as a commentator he has not been an original author in his own right. However, commentators like Sthiramati have shaped the doctrinal development of Yog?c?ra thought by introducing new concepts and reorganizing previous teachings to a similar (...) extent as ‘independent’ authors. In total seventeen works are ascribed to the author Sthiramati in Indian, Tibetan, Chinese and modern Western sources. The main concern of this study is to show some aspects of the relations between three of these works, namely the Madhy?ntavibh?ga??k?, the *S?tr?la?k?rav?ttibh??ya and the Tri??ik?vijñaptibh??ya, and to question the common authorship of these texts. (shrink)