Inspiration comes from
Walters Ms. W.175, known also as the Masters of the Dark Eyes Missal which originates in Utrecht, Netherlands at the end of the 15th century.
Neat book with a fabulous name. If you'd like to take a longer look at the many, many sumptuous illumination pages from the manuscript, you are in luck as the Walters has digitized the whole manuscript. Click for sexy, blingy images.
I look forward to trying out a few more pages from this gem. I'll be turning them in for general Kingdom use, so if you end up on the receiving end, drop me a line!