Now, because my first area of concern is based on Karameikos -- a land whose Gazetteer is built primarily as the most familiar type of D&D mini-setting in the overall setting of Mystara -- I'm also trying to make mine a starting point for a 'typical D&D' setting with a distinct character of its own.
In fact, creating a kingdom on one of the borders of a large empire with:
(1) a native population with its own pagan / syncretic beliefs
(2) neighbors (human and non-human) who have their own cultural, political, and religious beliefs; and
(3) a wise and cunning ruler with substantial yet limited resources and support
makes a strong argument for the practice of tolerance of many beliefs in the setting. That's not to say that there won't be clashes, but the Powers That Be will frown on those seeking to upset the delicate balances.
Actually, it's starting to sound a bit like Babylon 5, only instead of a space station, it's an entire country that is most definitely not neutral territory.
In any case, I've found myself awash in fairly dense and contradictory and confusing WikiPedia resources that I'd like to share with some of you:
Norse and Germanic Mythology
Alfheimr -- one of the nine worlds of Norse mythology, and home of the Light Elves. It has been characterized as mystical and benevolent but sinister and wicked at times.
Frey/Freyr -- brother of Freyja and also ruler of Alfheimr (it was given to him by the gods as a teething gift).
The Nine Worlds -- Midgard / Mannheim is one of them but other fantastic places to visit remain, even if differing sources don't agree on the lineup of worlds.
A Bible and The Book of Enoch
Always good for world-creation flavor, though I shall probably dip into Von Daniken's "Chariots of the Gods" and Sitchin's Earth Chronicles series at some point in time:
That's all for now. Keep those postcards and letters coming.