The blackletter style of lettering, used famously in the Gutenburg Bible, has always been one of my favorites. During my "medieval period", I studied calligraphy and attempted to reproduce the beautiful look of Medieval manuscripts, mostly using early versions of the blackletter style. But, I wish I had had this excellent article by Jennifer Farley to better understand the varous types of blackletter styles, such as Textur, Rotunda, Schwabacher, and Fraktur. Learn about the history and unfortunate controversy about using these beautiful fonts. The article has many helpful illustrations and also links to some free examples of blackletter fonts. Also, you might be interested in two blackletter (Textur) fonts in the CastleType collection: Goudy Text (my very first attempt at creating a digital font) and Cloister Black.

Another great article, Blackletter: A history of the beautiful script has even more information and illustrations, with more of the history of blackletter, and more terminology, such as Old English and Gothic.