 Complete the following phrase:  Although the status of the icon as the original Kazan icon remained disputed, Cyril G.E. Bunt concluded that it is the work of a great icon painter of the 16th century ... the pigments and the wood of the panel are perfectly preserved as exhaustive X-ray tests have proved, and have mellowed with age, suggesting that while it was a copy of the original icon, it was nevertheless the original icon carried by Pozharski in 1612. It was exhibited at the 