This is a corpus that is unique in the academic world. It presents those parts of ancient Greek commentaries preserved on papyrus, that is the hypomnemata and marginalia on Greek authors, as well as glossaries and lexica. Previously these have only been published scattered in separate works. A new installment of some 250–300 pages is planned to appear every 2–3 years (a total of about 10 installments are planned for the period 2003/2020). The entire work is divided into four main sections: Pars I Commentaria et lexica in auctores; Pars II Commentaria in adespota; Pars III Lexica; Pars IV Concordantiae et Indices.