It is claimed that in earlier times the Highland clergy wore the Highland dress and carried arms and that many attempts were made to prevent them wearing tartan and to force them to wear conventional ministerial habit. These, however, had only limited success. The Clergy tartan is sometimes called "The Priest's Sett", but in the Highlands is known as "Breacan nan Cleirach" - the tartan of the Clergy. As with so very many tartans, there are many variations of the Clergy sett, due to the vagaries of the illustrators of tartan books. There is no categorisation for occupational tartans so all the clergy tartans are classed as "Corporate".