Gnomon of Saint-Sulpice
Videos
The Gnomon of Saint-Sulpice is an astronomical measurement device located in the Church of Saint-Sulpice in Paris, France. It is a gnomon, a device designed to cast a shadow on the ground in order to determine the position of the sun in the sky. In early modern times, other gnomons were also built in several Italian and French churches in order to better calculate astronomical events. Those churches are Santa Maria del Fiore in Florence, San Petronio in Bologna, and the Church of the Certosa in Rome. These gnomons ultimately fell into disuse with the advent of powerful telescopes.
Gnomon structure at Saint-Sulpice
Gnomon hole in the stained glass window at Saint-Sulpice
Latin and French inscriptions at the base of the obelisk. The mentions of the King and his Ministers were deleted. The name P.C.CL.LE MONNIER survives above right after the deletion.
Gnomon
Videos
A gnomon is the part of a sundial that casts a shadow. The term is used for a variety of purposes in mathematics and other fields.
The gnomon is the triangular blade in this sundial.
The gnomon projection on the floor of the Santa Maria del Fiore Cathedral during the solstice on 21 June 2012
Gnomon situated on the wall of a building facing Tiradentes Square, Curitiba, Brazil