ACQUOY, JOHANNES GERHARDUS RIJK. – Dutch ecclesiastical historian, born in Amsterdam on 3 January 1829, died in Leiden on 15 December 1896. He received his doctorate in theology at the University of Leiden in 1857 with a dissertation that revealed him as a talented scholar of history. A. is known above all for his monumental history of the monastery of Windesheim. In 1881 he was called to occupy the chair of the history of Christianity at the University of Leiden, succeeding Rauwenhoff.
Among his works we may mention: Gerardi Magni epistolae XIV, e codice regio Hagano nunc primum editae et perpetua amotatione qua melius et ipse et tempora ejus cognoscantur, instructae, Amsterdam 1857; Het Klooster te Windesheim, 3 vols., Utrecht 1875–86; Handleiding tot de Kerkgeschiedvorschung en Kerkgeschiedschrijving, The Hague 1894 (2nd ed., there 1910).