Nel [[1687]] Montfaucon fu chiamato all' [[Abbazia di Saint-Germain-des-Prés]] dove cominciò a lavorare all'edizione delle opere dei Padri della Chiesa.
Nel [[1705]] esaminò e descrisse i manoscritti delgreci [[Fondsdella Coislin]],collezione indel ''Bibliothecaduca Coisliniana''di (Paris, 1705)Coislin.
InNel [[1714]] Montfaucon publishedpubblicò thei fragmentsframmenti ofdegli ''[[HexaplaExapla]]'' ofdi [[OrigenOrigene]].<ref name="Bouillet">"Bernard de Montfaucon", in Marie-Nicolas Bouillet and Alexis Chassang (eds.), ''Dictionnaire universel d'histoire et de géographie'', 1878.</ref>
He published 15 volumes of ''L'antiquité expliquée et représentée en figures'' between 1719 and 1724. An English translation of this work was published in 1721–25 under the title ''Antiquity Explained and Represented in Diagrams''. The work contained [[intaglio printing|copperplate]] folio engravings of classical antiquities. It included a depiction of the "Barberini Vase", more commonly known as the "[[Portland Vase]]". This book is published in English under the title ''Antiquities''.<ref>{{BBKL|m/montfaucon|band=6|autor= Georgios Fatouros|artikel=Montfaucon, Bernard de|spalten=92-94}}</ref> The materials used in this work were taken from the manuscripts deposited in French libraries. It contains many illustrative facsimiles, though they are engraved in a rather coarse way.
In 1719, Montfaucon was named by [[Philippe II, Duke of Orléans|Philippe d'Orléans]] to the [[Académie des Inscriptions et Belles-Lettres]]. In 1719 after the death of the Jesuit father [[Michel Le Tellier (1643-1719)|Michel Le Tellier]], confessor to the late Louis XIV, Bernard de Montfaucon took his place as confessor to the young Louis XV.
