View source for Atto of San Marco, Brevarium canonum

{{DISPLAYTITLE:''Brevarium canonum'' of Atto of San Marco}}
{{Infobox collection
    | key            = AM
    | size           = Medium (500 to 1000 canons)
    | tpq            = 1074
    | taq            = 1078
    | century        = saec. XI
    | location       = Rome
    | normregion     = Central Italy
    | generalregion  = Southern Europe and Mediterranean
    | specificregion = Rome
    |wikidata=Q117075663| title          = Atto of San Marco, Brevarium canonum
    |alttitle=Breviarium canonum Attos|alttitle1=Capitulare| author1        = Fowler-Magerl, Linda
}}
Atto, cardinal priest of the titular church San Marco at Rome, compiled shortly after 1073 a breviary of canon law for his clerics. It is the first truly Roman collection of the century. Atto had been elected archbishop of Milan in 1072 by the Patarini faction, but he was not accepted by the imperialist and aristocratic factions and was forced to flee. He spent most of the rest of his life as cardinal at the church of San Marco. Apparently the [[Burchard of Worms, Liber decretorum|''Liber decretorum'' of Burchard]] was available to the clerics of his church, but Atto disapproved of its use because it contained apocryphal texts and because it contained canons from ''concilia trasmarina'' which, if at all authentic, were valid only locally. Only those canons have general validity, he said, which have been approved by the pope. Since his clerics were too poor to travel and had no one else to teach them, he felt obliged to provide them with a brief collection in which the texts of the canons were condensed. 

The present analysis is based on the copy in the Ms [[Città del Vaticano, BAV, Vat. lat. 586|Vat. lat. 586]] ({{Coll|AM}}), which is the only surviving copy. The sources are the [[False Decretals]] and the letters of popes Gelasius I, [[Registrum Gregorii|Gregory I]] and Nicholas I. Conciliar canons from the ''[[Collectio Dionysio-Hadriana|Dionysio-Hadriana]]'' tradition are used, but are subordinate to the decretals. Series of the canons from the collection were used by [[Anselm of Lucca, Collectio canonum (A version)|Anselm of Lucca]] and [[Deusdedit, Collectio canonum|Deusdedit]] and by Placidus of Nonantola for the ''[[Placidus of Nonantola, Liber de honore ecclesiae|Liber de honore ecclesie]]'' he composed circa 1111.

== Literature ==

For the edition see Angelo {{Author|Mai}}, Attonis cardinalis presbyteri Capitulare seu Brevarium canonum, ex Codice Vaticano, in: Scriptorum veterum nova collectio e Vaticanis codicibus edita 6. 2 (Rome 1832), pp. 60–102 ([https://nbn-resolving.de/urn:nbn:de:bvb:12-bsb10216565-7 online]). The edition is also found in {{Author|Migne}} PL 134.27–52. – Franz {{Author|Pelster}}, Das Dekret Burkhards von Worms in einer Redaktion aus dem Beginn der gregorianischen Reform (Cod. Vat. lat. 3809 and Clm 4570), Studi Gregoriani 1 (1947), pp. 323–324, edited a part of the prologue and identified the manuscript used by Mai as Vat. lat. 586. For a translation [{{FM|139}}] of the prologue into English see {{Author|Somerville}} and {{Author|Brasington}}, Prefaces, pp. 118– 121. See also Detlev {{Author|Jasper}}, Burchards Dekret in der Sicht der Gregorianer, in: Bischof Burchard von Worms 1000–1025, ed. by Wilfried {{Author|Hartmann}} (Mainz 2000), pp. 179–184. – For the use of the letter JE 2833 of pope Nicholas I see Robert {{Author|Somerville}}, Pope Nicholas I and John Scottus Eriugena: JE 2833, ZRG Kan. 83 (1997), pp. 73–76. – For the use of the breviary in later collections see {{Author|Fournier – Le Bras}}, Histoire, pp. 2.20–25. – {{Author|Kéry}}, Collections p. {{Kery|233}}–234.

[[Category:Canonical Collection]]
[[Category:Collection Key is AM]] 
[[Category:medium (500 to 1000 canons) collection]]  
[[Category:Collection from Rome]]
[[Category:Collection from Central Italy]]
[[Category:Collection saec XI]] 
[[Category:Clavis entries based on early printed books]]