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 in previous live performances on their Nothing Rhymes with Circus tour and in the music videos, "The Ballad of Mona Lisa" and "I Write Sins Not Tragedies". The members of the "Inner Circle" of the Punxsutawney, Pennsylvania Groundhog Club wear top hats on February 2 of every year when they perform the Groundhog Day ceremonies with Punxsutawney Phil. Steampunk culture also incorporates the top hat into accepted headgear choices, though top hats worn in such a context are sometimes made of leather or similar materials and, now and then, even have simulated gears or other adornments secured to them. A