为什么不是dressing而用被动dressed

Question

I remember the bright-red tobacco tin, with a picture of Queen Victoria's partner, Prince Albert, dressed in a black dress coat and carrying a cane.

Answer 1

dress是给...穿衣服，用法是dress sb，如：The babysitter dresses the baby everyday.保姆每天都要给宝宝穿衣。
穿着衣服通常是用be/get dressed （in），所以这句话里是用的过去分词dressed