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 Top hat A top hat, beaver hat, high hat, silk hat, cylinder hat, chimney pot hat or stove pipe hat, sometimes also known by the nickname "topper", is a tall, flat-crowned, broad-brimmed hat, worn by men from the latter part of the 18th to the middle of the 20th century. By the end of World War II, it had become a rarity in ordinary dress, though it continued to be worn in specific instances, such as state funerals, also by those occupying prominent positions in the Bank of England, by certain City stock exchange officials and occasionally when passing between