This dissertation consists of a translation of the first fourteen chapters of Hayasirsa Pancaratra and a detailed analysis aiming at its contextualization in historical, cultural, and theological milieus. The Hayasirsa Pancaratra is a Sanskrit text from approximately the ninth century A.D. primarily dealing with rituals concerning the construction of a temple to the god Visnu. The text is probably from Eastern India, most likely Bengal or Orissa. The Hayasirsa Pancaratra belongs to the Pancaratra tradition, a Visnu centered movement within what we today call Hinduism. The Hayasirsa Pancaratra has incorporated older texts, most of which are no longer extant, and has also been a source-text for later works, most notably the Agni Purâṇa and th...