The Proper Art of Writing (1655)
I stumbled upon these calligraphy examples on The Public Domain Review. They are taken from a 17th Century German book. Some of the characters are so highly decorated aren’t even recognisable anymore.
The volumes’ full title is as extravagant as the examples it shows: The Proper Art of Writing: a compilation of all sorts of capital or initial letters of German, Latin and Italian fonts from different masters of the noble art of writing. See more here