In the Middle Ages, clothes had a social signification :
according to your social position or your function, your did not dress the
same way.
Most men of the XVth century wore very short coats,
like the donor of the decoration of the chapel Saint-Sebastian ;
but some of them (priests, leading citizens, scholars), by decency,
continued to wear long dresses and coats.
Among them, doctors and lawyers share the privilege to wear
the same red costume, lined with white fur.
However, the aumôniere the doctor, represented here, wears
attached to his
belt is not a specific object : Many
men have a purse of a bag attached to their belts.