King Charles' skills with a brush and watercolours have made him a top-selling artist, and other family members have also shown they are quick on the draw. Not only does Charles reign over the country, but he has proven himself to be a king in the art world too, as one of the UK’s most successful living painters.The King’s love of using watercolours first began at Gordonstoun school in Scotland, and signed copies of his work now sell at auction for four-figure sums.