GIA4789105: Treating on architecture, two men lying on the floor perform calculations probably to measure the magnetism and gravimetry of a plot: board drawn from “De Architectura Libri decem” by Leon Battista Alberti (1404-1472), architect, mathematician, Italian poet of the Renaissance, London, 1739, Alberti, Leon Battista (1404-72) / Bridgeman Images
LUX4789449: France, Pays de la Loire, Loire-Atlantique (44), Saint-Nazaire (Saint Nazaire): submarine 'le surcouf' with its crew of 140 men at the edge of the quay where a crowd comes to contemplate it, submarine of great cruise launches in 1929 sinks in 1942, 1936, Unknown photographer, (20th century) / Bridgeman Images