The 19 Declamationes Maiores form the only extant collection of developed Latin declamations from classical antiquity. (For a general introduction to Roman declamation, see article “Declamationes Minores”.) The collection was most likely composed by multiple authors from the end of the first through the beginning of the third centuries CE. Collection and publication likely took place in the late fourth century CE (Stramaglia 2006). The fully elaborated Maiores present a clearer sense of the literary goals of declamation than the briefer excerpts preserved in the Elder Seneca and Calpurnius Flaccus or the compressed arguments of the pseudo-Quintilianic Declamationes Minores.…
Bernstein, Neil. "Declamationes Maiores". The Literary Encyclopedia. First published 07 February 2013; last revised .
[http://www.litencyc.com/php/sworks.php?rec=true&UID=34882, accessed 27 May 2015.]