Meridian of the Church of Saint Martin des Vignes (Troyes) - Noon Mark on Saint...

Meridian of the Church of Saint Martin des Vignes (Troyes) - Noon Mark on Saint Martin des Vignes (Troyes) - It dates from 1778. This is one of the few Meridians in France to indicate the time of the Meridian of the Ile de Fer (now Hierro in the Canary Islands). The Meridian of Iron Island was defined as the Meridian of origin by Ptolemee, in order to count positively the longitude in Europe. At that time, Iron Island was the most western known land. This meridian was considered in France as a meridian of reference, from 1634 to 1792, then abandoned to the profile of the meridian of Paris, then that of Greenwich