Despite only appearing a few times in the series as Prince/King John, Phil Davis made a huge impact as the much disliked monarch, often out-acting all on the screen, including the terrific, scene-stealing Sheriff, played by Nickolas Grace.
This black shawl robe with noticeable golden embroidered trim, perhaps Byzantine inspired, is clearly seen being worn in a number of key scenes through two episodes of Series 3. Rutterkin, and, The Betrayal.
It is one of one, only.