Bana is considered the foremost writer of Sanskrit prose and one of “the brightest stars in the galaxy of Sanskrit poets” (Kane) and is well-known for his use of obscure words and rare meanings of common words a good number of which have not been recorded in our standard Sanskrit dictionaries. In his famous Harsacarita he relates the deeds of King Harsavardhana (606–647 CE), his patron. It is praised as “a veritable mirror of the many-sided culture as it had evolved during Gupta times” and as “a perennial spring spurting valuable facts about the cultural history of ancient India” (Agrawala). The late Professor Willem Bollee (1927–2020) has prepared an index of words and notions of the Harsacarita with a view to unclosing the wealth of cultural information contained in this masterpiece of Bana. He has released the present edition for printing