It only took us 1 night and about $20 to make this costume. 1 trip to the fabric store for the trim pieces and taffeta.
After our trip to Italy in 2010, we decided to recreate some of the memories for our Italian costume theme.
Step 1: Supplies
2 - yards of white satin-y/taffeta type material (main part of the costume / hat covering)
1 - blue robe (for use as a belt -- we used some graduation honor cords we had around the house)
2 - 8.5x11 sheets of thin craft foam (the basis of the hat)
1 - can of spray adhesive
1 - 1' of light blue fringe trim
1 - strip of light blue fabric (sash)
2 - cross appliques (iron on)
1 - 3' wide/fancy gold ribbon (hat trim)
1 - small square of red felt (inside of the hat)
1 - big/fake plastic "diamond" ring
1 - hot glue gun / glue sticks
1 - sewing machine (optional)
5? - safety pins to hold things together
Step 2: Shirt and Cover
The cassock is then tied around the waist to form gown-like gathers using the blue rope.
The shiny cover over the cassock can best be described as a big "football" shape of taffeta (with a hole in the middle for the head). This overlays the cassock and hangs down to about the knees, slightly wider than the shoulders. We actually sewed a seam around the edges of the football and neck-hole, but one could easily use the "hot glue" sew technique again.
Step 3: Stole (sash)
Step 4: The Hat (Mitre)
Here is a link to a site with a better picture of what this looks like: http://www.pajamacity.com/z-how-to-make-a-pope-costume.asp
We then sprayed spray adhesive all over the outside and smoothly laid down the taffeta covering.
Next, hot glue one band of ribbon down the center front of the hat. Follow that with a horizontal band all the way around the bottom edge. We hot glued the red velvet from the inside to form the "top" of the hat between the front and back triangles. Optionally you can add two small tails hanging from the back (we left extra fabric from the back covering).
Step 5: Finishing Touches
Laugh and Enjoy!