The 1623 published collection of William Shakespeare's plays. The first such collection printed in folio format.
First-folio Sentence Examples
Another question with which the textual critic of modern authors must be prepared to deal is the relative importance of different editions, each of which may have a prima facie claim to be considered authentic. Thus Shakespearean criticism must decide between the evidence of the first folio and the quartos: the critic of Shelley's poems must consider what weight is to be attached to the readings in the posthumous edition by Mrs Shelley, and in unpublished transcripts of various poems. Where there is great or complicated divergence between the editions, as in the case of Marlowe's Faustus, the production of a resultant text which may be relied upon to represent the ultimate intention of the author is well-nigh impossible.
the first folio of Shakespeare's Comedies, Histories and Tragedies, On the field of battle he was as energetic in attack as he was followed in 1902 and 1904 by supplementary volumes giving constant in defence, and his personal influence over the men details of extant copies, and in 1906 by a complete edition of Shakespeare's Works.
facsimile reproduction of the Furness Shakespeare Library copy of the First Folio.
I thought you might like one or two pictures of the very first folio I tackled.