Sardanapalus was published with The Two Foscari and Cain in late 1821. Sardanapalus and The Two Foscari each have the sub-title “A Tragedy”, but they were not written for the stage and are what is known as closet or verse dramas. Both works were, however, performed in London in the 1830s, with Sardanapalus also being staged (with some considerable success) in the same city later in the nineteenth century. In a short note for this play, Byron tells us that he has observed the dramatic “unities” of action, time, and place: it, then, follows neoclassical precedents, and a small number of characters appear in the action, w…
White, Adam. "Sardanapalus". The Literary Encyclopedia. First published 30 September 2013; last revised 30 November -1.
[http://www.litencyc.com/php/sworks.php?rec=true&UID=2314, accessed 21 April 2015.]