Father Rosenthal preparing for St Nicholas Day (n 6th December) with the Boy Bishop. This was once a popular tradition throughout Europe, reaching its height in the 16th century. Being a Boy Bishop for the church was a bit like being "mayor-for-a-day". The custom of selecting a youthful Nicholas Bishop has been revived and updated in some English cathedrals and parishes. Now, as before, the boy, or sometimes girl, is fully fitted out as a bishop, with cope, mitre and carrying a Bishop's crozier.