Background
D'Achery was born at Saint Quentin in Picardy.
Librarian monk Church historian
D'Achery was born at Saint Quentin in Picardy.
He entered the Order of St. Benedict at an early age and was professed at the Trinity Abbey, Vendôme, on 4 October 1632, but his health soon obliged him to remove to Paris. As librarian of the monastery he was soon acquainted with its rich treasures of medieval history and theology. By a continuous correspondence with other monasteries, both in and out of France, he made himself a bibliographical authority of the first rank, especially in all that pertained to the unedited or forgotten writings of medieval scholars.
He became a member of the monastery of St. Germain des Prés in 1637, which in nearly fifty years he scarcely ever left, and he died there aged about 75.