Lord Zack's Planescape
Eberron is a material plane where magic is used as technology. The world of Eberron is orbited by thirteen bodies that are either themselves demiplanes or associated with other planes. It is fairly isolated from other planes, and the people of Eberron only know of a few planes. Little is known about Eberron in the greater planes, but rumors tell of society where magic is extremely prevalent. Some believe it is it’s self a demiplane.