Who owned the largest library during the Middle Ages?

Benedictine monks

University

King Richard

Library of Congress

Universities

Explanation:

Although throughout Middle Ages church main role and Benedictine monks were pretty influential when it comes to education, the first universities made even greater changes. When the first universities were opened in 12th Century the knowledge started spreading as never before. That is why for example University of Sorbonne had 1722 volumes of manuscripts in 1328 - the largest library in Europe.