I made a 15th c. hat! This hood is present in many 15th century images, and I've wanted one for a while. I finally made it while watching a movie last night!
I came upon sevenstarwheel.wordpress.com in my search, and her pattern is very similar to mine. I just updated it and changed a few things! I also lined mine because I like the weight, and I like to sew everything by machine and then turn it inside out to hide the stitches. hehe
Note: This creates a fully lined hat. I started with two small rectangles for the brim and a large rectangle I folded in half for the back. I sewed the large rectangle together, cut off the top, then sewed the two brim pieces together with the back stuffed inside - so it turns right side out. The back of the brim is stitched together at the very bottom. To wear, wrap the two tails around the head and tie.