Abbo of Fleury (in Latin Abbo Floriacensis), also known as Abbon or Saint Abbo' (c. 945~950 to - 13 November,1004) was a monk, and later abbot, of the Benedictine monastery of Fleury sur Loire (the modern Saint-Benoit-sur-Loire ) near Orléans, France.

He was born near Orléans in the mid 10th century, and was educated at Paris and Reims, devoting himself to philosophy, mathematics, and astronomy. He spent two years in England assisting Archbishop Oswald of York in restoring the monastic system. He was also abbot and director of the school of the newly founded monastery of Ramsey in the County of Huntingdon from 986 to 987. There he learned of the martyrdom of Saint Edmund (November 870), and wrote a passion in Latin on it. He also wrote a Latin grammar for his students in England. Among his other works are a simplification of the computus, the computation of the date of Easter; an Epitome de vitis Romanorum pontificum (book on the lifes of Roman popes); and other treatises on controversial topics and letters.

Abbo returned to Fleury in 988, where he was selected abbot of Fleury after the death of the Abbot Oilbold . But another monk, who had secured the support of the King and his son Robert, Bishop of Orléans, contested the choice, and the matter assumed national importance. It was finally settled by the famous Gerbert (later Pope Sylvester II) in favour of Abbo. The new abbot was active in contemporary politics: He was present at the Synod of St. Basolus (St. Basle), near Reims, at which Archbishop Arnolf was tried for treason and deposed, to make way for Gerbert. In 996 King Robert II(Robert the Pious) sent him to Rome to ward off a threatened papal interdict over Robert's marriage to Bertha. On the way to Rome he met Pope Gregory V, who was a fugitive from the city from which the Antipope John XVI had expelled him. Between the Pontiff and the Abbot the greatest esteem and affection existed. The royal petition for a dispensation was rejected. Abbo succeeded in bringing about the restoration of Arnulf to the see of Reims. He was influential in calming the excitement and fear about the end of the world which was widespread in Europe in 1000.

In 1004 he attemped to restore discipline in the monastery of La Reole , in Gascony, by transferring some of the monks of Fleury into that community. But the trouble increased; fighting began between the two parties and when St. Abbo endeavoured to separate them he was pierced in the side by a lance. He concealed the wound and reached his cell, where he died in the arms of his faithful disciple Aimoin, who has left an account of his labours and virtues. The miracles wrought at his tomb soon caused him to be regarded in the Church of Gaul as a saint and martyr, although he does not seem to have been officially canonized by Rome. His feast is kept on 13 November

His biography, written by his disciple Aimoin of Fleury, in which much of Abbo's correspondence was reproduced, is of great importance as a historical source of information for the reign of Robert II, especially with reference to the Papacy.

External links and references

• A more extensive biography: http://www.wmich.edu/medieval/rawl/edmund/abbo.html
• His Passion of St.Edmund:
  • http://www.wmich.edu/medieval/rawl/edmund/latin.html
  • English translation: http://www.wmich.edu/medieval/rawl/edmund/lattrans.html
• An image of one of his manuscripts: http://www.irht.cnrs.fr/coloque_abbon_image.htm