Pagan

Pagan can mean, variously, pre-christian (eg: ancient Greek), or post-christian but unconverted (to any type of monotheistic religion), eg: Viking pagan, Baltic pagan, etc.

The last great pagan kingdom in Europe was that of Lithuania, which began its rise under Gedmyn in 1316 or so. Lithuania remained a pagan Kingdom until about 1387, when Jagiello, King of both Poland and Lithuania converted to Catholicism.

Pagan does not mean Heretic, as that refers to a follower of christianity who professes a doctrine different to that of the ruling church. Neither does it mean an Infidel such as a Muslim or a Jew.

Your SCA Persona is a Pagan

Tricky subject. There is no law in the SCA covering pagan personae specifically, except the one tenet that obvious trappings of any kind of religion should not be used. This shouldn't be a major issue for you as most early pagan religions were not proselytical.

Pick a time period and place, that probably means Scandinavia, parts of northern Europe in the early or pre-christian era, or the Baltic prior to the middle of the 14th century.

Do a lot of reading. I (Del) cannot claim to be an authority on pagan cultures, in fact I know very little apart from what I wrote above. When you've done your research come back and fill this bit in, and correct and/or expand this article. Please. It's probably a complete shocker.