Empire Chronicles is a low-to-mid-magic world based upon an anachronistic blend of Classical Rome, early medieval Europe, and Western mythology. It complies with and adheres to 3.5/Planescape cosmology, effectively connecting it to existing D&D lore (i.e., Elves have Corellon Larethian, Dwarves have Moradin, there are the Outer Planes, the elemental planes, Sigil, and so on and so forth).
Much of the known world is occupied by the eponymous Empire, which serves as the focal point for civilization. Other civilizations do exist, but most are beyond the scope or interest of the Empire, which stretches across most of one continent and into two more. There is a very loose correlation with the geography of Earth, in that there is a vaguely Europe-like continent, a vaguely Asia-like continent, and a vaguely Africa-like continent, with similar ethnic/cultural groups who provide a basis for the aesthetics of different parts of the Empire.
The Empire itself is a loosely-centralized federation of feudal provinces, governed by a Senate alongside an oligarchy of influential citizens and members of the nobility. Its head of state is a deified Empress, who is largely removed from the day-to-day affairs of the Empire. The federal government’s influence wanes in most of the outlying provinces of the Empire, and is replaced by the feudal power structures present there. A high-ranking Imperial noble, often a duke or prince, rules each such province, to which most other nobles in the region are pledged. Although several of the central provinces are also ruled in this fashion, in practice the power structures there are more strongly centralized.