This upcoming weekend, there is a Middle Ages festival in Annweiler am Trifels, a bit west of Landau in the Pfalz. Its focus is Richard the Lionheart, who, although a 10th/11th centry King of England, spent most of his time in France. Richard had ties to Germany; he was imprisoned at the Trifels castle at one point.
I recently heard about this festival that is devoted to him. One thing that I love about it is that the mayor of Annweiler am Trifels is one of the costumed members of the festival. How cool is that? I can't personally go because I have another commitment, but maybe I'll make it next year.
For more information, check out this link: http://richard-loewenherz-fest.de