On the weekend of 20 and 21 January, a professional development course was held for the stone tailors of the cayenne in Paris.
In a weekend the objective was to be able to understand the drawing and the size of a "spherical niche", an element of architecture fitted in stone intended to form a recess in a wall representing a quarter of a sphere.
The courses organised by the Companion Union are also open to young professionals and apprentices wishing to improve their skills.
