the Dionysio-Hadriana. He also contributed an array of inauthentic interpolations to authentic Hispana materials, adjusting ancient legal proclamations here and there to fit his purposes. This so-called interpolated Hispana (also known as the Autun Hispana) survives today in only one complete copy, namely Vatican, Biblioteca Apostolica, Vat. lat. 1341. At some later point Pseudo-Isidore forged a great many papal decretals in the names of popes from Clement I to Gregory the Great, which he then inserted into his interpolated Hispana. Sixty decretals from the earliest pre-Nicene popes (Clement through Melchiades) formed Part I of the new collection. Then came the conciliar material from the interpolated Hispana (originally Part I, now Part II), which received no further alterations. Finally came the original decretals part of the Hispana (Part II originally, now Part III), where many further decretal forgeries were carefully integrated with the authentic fund of Hispana decretals. This enormous compendium then received a preface in the name of the fictitious Isidorus Mercator. It is from this false Isidorus that the forger came to be known as Pseudo-Isidore. The third major constituent of Pseudo-Isidore's output consists of a collection of forged capitulary legislation ascribed to Charlemagne and Louis the Pious. These False Capitularies, which consist mostly of excerpts from genuine biblical, patristic and legal sources, are false primarily in the sense that almost none of them were ever promulgated by the Frankish kings. Among the many genuine items are also select forged capitula that advance the Pseudo-Isidorian program. In a preface, the pseudonymous compiler, Benedictus Levita (Benedict the Deacon) claims that he found these neglected capitularies in the archives of the cathedral at Mainz; and that the former Archbishop Otgar of Mainz ordered him to collect this material for posterity. Because Benedict seems to acknowledge that Otgar is dead at the time of his writing, it has been possible to date his preface to the years after 847. Benedict presents his three books and appendices of pseudo-capitularies as an expansion to the authentic and widely known capitulary collection assembled by Ansegisus of Fontanelle. Pseudo-Isidore also developed a small series of more minor forgeries which we find as appendices in manuscripts of the False Decretals. These include the Capitula Angilramni, a brief collection on criminal procedure allegedly given to Bishop Angilram of Metz by Pope Hadrian I; and a series of excerpts from the Rusticus version of the Council of Chalcedon. Authorship