Squinch

A trompe is a vaulted gusset in the form of half of a hollow cone with introspective downward opening or a similar upward tapering hollow geometric figure. Squinches used in architecture to engage in a through route a design with a square base with circular, such as the crossing of a church building in a dome.

At a Tromp coupling the four corners of a square are chamfered, so that an octagon is formed. These bevels are brick in the form of sheets with tapered upwards niche. As a rule, two or more sheets stages are staggered in order to better adapt the basis of Trompe the right angle of the lower building part.

As the Pendentifkuppel can also in a closed dome or Tromp durchfensterter tambour, which serves to increase the coupling to the structure, to be inserted.