This article reflects on the activities of the Indian Buddhist scholar-monk Kamalaśīla (c. 740–795) in imperial Tibet. Following accounts offered by Tibetan historians of later periods, these activities have so far been understood as more or less limited to Kamalaśīla’s victorious participation in the historically momentous “Great Debate” at Bsam yas monastery against the Chinese Chan master Heshang Moheyan. This article suggests that he also composed altogether seven of his works – and possibly more – while residing in Tibet, and sketches aspects of his intellectual profile on this basis. While remaining focused on Kamalaśīla, the article also raises wider-ranging questions regarding the activities of Indian Buddhist scholars in imperial Tibet against the backdrop of interconnected histories across South, Central and East Asia.