Gregory of Catino (1060 – aft. 1130) was a monk of the Abbey of Farfa and "one of the most accomplished monastic historians of his age." Gregory died shortly after 1130, possibly in 1133. Gregory was born into the family of the counts of Catino, a town near Farfa. His father, Dono, entered him and his elder brother into Farfa as child oblates. Gregory was educated in the abbatial school founded by Abbot Hugh, and he remained resident at the abbey for the rest of his life. Archival and documentary work In 1092 Gregory proposed a major overhaul of Farfa's archives to Abbot Berard II, who promptly commissioned him to do it. He began on 19 April, copying every charter in the archives—save leases, which he was planning to do in a separate work. His work was interrupted by circumstances at the monastery, but by 1099 and Berard's death the work was substantially complete down to that year. It was a two-volume collection he titled Liber gemniagraphus sive cleronomialis ecclesiae pharphensis, usually known as the Regestum Farfense, now in the Biblioteca Apostolica Vaticana. He did the reader the favour of glossing his own neologisms: gemniagraphus meant memoria descriptionis terrarum (descriptive record of lands) and by cleronomialem he meant heredity, indicating that Farfa's lands remained with it as if hereditary. Between 1099 and 1103 Gregory compiled a collection of excerpts of canon law for the introduction of the Regestum. This collection, known as the Collectio Farfensis or Collectio Canonum, primarily contains excerpts about property rights. There is disagreement among scholars today whether Gregory had a specific political purpose in mind in his selection, or was simply affirming the property rights of the abbey to its own monks. There are also three charters copied in Gregory's hand and bound into a volume with one of his later historical works. These seem to represent an earlier attempt to preserve Farfa's archives that was abandoned in favour of a comprehensive treatment, the Regestum. This edition of three charters is sometimes therefore known as the "Prae-Regestum". In 1125 Gregory's nephew Todinus returned to his uncle's work and added seventy folios of new charters (post-1099) and a few older ones that Gregory had overlooked. Between 1103 and 1107 Gregory was working on his Liber largitorius vel notarius monasterii pharphensis, which he titled his Liber notarius sive emphyteuticus. It is a register of all the long-term leases