Stuttgart has a very nice market, hundreds of vendors, nicely decorated stalls, good food, and of course gluhwien. From the
Stuttgart website:
First mentioned in a document in 1692, the Stuttgart Christmas Market contains more than 230 lovingly decorated stalls and is not only one of the oldest but certainly also one of the most beautiful and largest Christmas markets in Europe
See also:
Stuttgart Christmas Market
Christmas Market Dates 2004 / 2005