Christopher Decker's critical edition of the Rubaiyat is the first to publish all extant states of the poems and to unearth a full record of its complicated textual evolution.

The text of FitzGerald's 4th ver. facing corresponding quatrains by Nicholas

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

That first edition is presented here in facsimile, accompanied by computer-generated typesetting of the later editions, providing a 'complete edition'.