Carolus or Karel de Visch (15 August 1596 – 11 April 1666) was a Cistercian bibliographer, and prior of Ten Duinen Abbey.
From 1620 Visch compiled a new necrology of the abbey, his first historical work, and became familiar with the Spanish Cistercian historian Crisóstomo Henríquez, then residing in the Low Countries.
Abbot Bernard Campmans appointed him librarian to the abbey, and in 1628 Visch completed a catalogue of the library's manuscripts.
His disagreements with Abbess Catharina Doens about the implementation of the Tridentine reforms of monastic life led to his forced removal from the abbey in 1636.
[1] As a historian and bibliographer of his community and his order, Visch corresponded with Sanderus, Bollandus, Henschenius, Mabillon, and Ferdinando Ughelli.