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
The Man Who Mistook His Wife for a Hat (opera) The Man Who Mistook His Wife for a Hat (opera) The Man Who Mistook His Wife for a Hat is a one-act chamber opera by Michael Nyman to an English-language libretto by Christopher Rawlence, adapted from the case study of the same name by Oliver Sacks by Nyman, Rawlence, and Michael Morris. It was first performed at the Institute of Contemporary Arts, London, on 27 October 1986. The minimalist score makes use of songs by Robert Schumann, in particular, "Ich grolle nicht" from "Dichterliebe", in which Dr. S. accompanies Dr. P., singing the ossia as a descant. Mrs. P. plays