Until the Regency period, Anglican clergy regularly wore the cassock in public, after enjoying something of a revival in the mid-20th century, this custom is again less common. The traditional Anglican headwear with the cassock was the Canterbury cap, which is now seldom used. Some Anglo-Catholic clergy still wear the biretta.[citation needed] From the mid-eighteenth century, Bishops and archdeacons traditionally wore a shortened version of the cassock, called an apron (which hung just above the knee), along with breeches and gaiters.