Mystara is an earth like world whose geography resembles that of our early planet.
The best known part of Mystara is the Known World area of Brun. Here are the mighty empires of Thyatis and Alphatia. Lesser countries include the trading nations of Darokin and Minrothad, the Grand Duchy of Karameikos, Ylaruam, Glantri and Ierendi. Non-human races have their own nations too; elves dwell in Alfheim, dwarves in Rockholme and halflings in The Five Shires. Other less well known countries include Ostland, Vestland and The Soderfjiord Jarldoms, Ethengar, Heldann and far Sind.
Beyond Brunn are the continents of Skothar and Davania.
Mystara appears to have no gods. Instead, Immortals seem to fill this place in the veneration of it’s inhabitants.
Although many nations and empires have risen and fallen, it is possible to make out a rough timeline of Mystara.