The Thomas Fisher Rare Book Library at the University of Toronto is the largest rare book library in Canada. The Fisher mounts three major exhibitions a year, along with monthly mini exhibitions. Its collections include some of the rarest print and manuscript materials available not only in Canada but in the world, including manuscripts going back to the 11th century, Canada's only copy of the 1623 Shakespeare First Folio, and the manuscript papers of Margaret Atwood and Leonard Cohen.