The Unpublished Working Drawings for the Nineteenth-Century Restoration of the Double Structure of the Real Chiesa di San Lorenzo in Torino

In his church of San Lorenzo in Torino Guarino Guarini conceived a structural organism that transfers the weight of the dome to the foundations by means of a partially concealed ribbed structure. This rare example of architecture in which form and structure do not coincide is not the result of an eccentric choice of technical virtuosity, but rather a structure mechanism aimed at achieving certain effects that have been knowingly sought out by the architect.