Opera hat described as: Some sources have taken this to describe an early folding top hat, although it is not explicitly stated whether Dollman's design was specifically for male or female headgear. Dollman's patent expired in 1825. Operating from Poissy, Paris, France, around 1840, Antoine Gibus's design for a spring-loaded collapsible top-hat proved so popular that hats made to it became known as "gibus". They were also often called "opera hats" due to the common practice of storing them in their flattened state under one's seat at the opera, though the term can also refer to any tall formal men's hat. The
Top hat players to mark their position as they progress around the board. In Freemasonry, as practiced in North American lodges, top hats are often associated with the position of Worshipful Master as he is the only member allowed the privilege of wearing a head covering to signify his leadership within the lodge. However, the Master is not obliged to wear a top hat, and can wear whatever type of hat he deems appropriate for the occasion. This is because there are varying degrees of formality in different Lodges, from formal wear to everyday dress. It is also common for a Worshipful