From publisher blurb:
Pax Lexque is a campaign setting based on an alternate reality historical earth in which the Roman Empire was co-mingled with conventional elements of fantasy - elves, dwarves, wizards, clerics, giants, dragons and everything else you’d expect.
After a magical war tore the Roman Empire apart, the empire is now rebuilding, with its eyes on its eternal motto, “Pax Lexque” or “Peace and Law”. The campaign's starter modules (The Hand of the Law) place PCs in a special forces arm of the imperial army. Their squad is sent on missions to deal with unexplained problems left over from the magical war - cursed or haunted battlefields, horrific monsters summoned during the war, necromancers and diabolists who still try to delve into forbidden knowledge.
This guide is meant as a sandbox environment. The world of the Great Sea region is presented with its history and geography broken down to twenty nations, ready for characters to explore. Nineteen new patrons particular to this world are described, six of which are presented in full detail, complete with patron spells. Also included are four new character classes: Dwarven Cleric, Elven Ranger, Felid (or catfolk) and Gnome.