Although the Frankfurt Book FairWorld's largest trade fair for books; held annually mid-October at Frankfurt Trade Fair, Germany; First three days exclusively for trade visitors; general public can attend last two.'s modern incarnation as the world's largest trade fair for books began in 1949, its history goes back more than five hundred years. And indeed, up until the end of the 17th century (when it was eclipsed by Leipzig) it was considered the preeminent European book fair.
And one interesting fact that illustrates the fair's early importance is this: the 1622 catalog for the fair included the announcement of the publication of Shakespeare's First Folio.