The Hundred Kingdoms
The Hundred Kingdoms is similar in many ways to Europe of the Dark Ages and Early Middle Ages. Of course, there is magic, but magic has little effect on the day to day lives of the vast majority of people.
The civilized races banded together under the Empire of Nerath, forming a relatively diverse society. While most of the population is Human, Halflings and Dwarves are an everyday sight. Elves, Eladrin and Genasi are somewhat less common, but even villagers catch sight of one every so often. A large town might have a few Dragonborn and Tieflings. Deva have always been rare, but they can be counted on to be in the thick of things.
Society is largely agrarian under a system of manorialism. Fortified manor houses cluster around walled towns where artisans and tradesmen tend to congregate and where the local lord has his military presence.
A common thread of worship connects the Hundred Kingdoms; the Luminarian Church of the Empire of Nerath is the major force of Light throughout the area. The church, however, is not a monolithic or universal authority. Abbeys and major temples in large towns tend to form a sort of regional hierarchy over the smaller temples that serve the surrounding area. Even so, the liturgy tends to be roughly the same from town to town, though each temple might emphasize a different aspect of their patrons.