DGA3953209: Portrait of Edwin Howard Armstrong (1890-1954), American scientist, engraving / Bridgeman Images

DGA3953218: Antonio Santi Giuseppe Meucci (1808-1889), Italian inventor, photograph / Bridgeman Images

DGA3953233: Degumming of untwisted raw silk, silk processing Italy, 20th century / Bridgeman Images

DGA3953234: Construction of power plant, northern Italy, 20th century / Bridgeman Images

DGA3953238: Interior of power plant, northern Italy, 20th century / Bridgeman Images

DGA3953239: Construction of power plant, northern Italy, 20th century / Bridgeman Images

DGA3953059: Dental clinic, dentist treating soldier, Trench Mortars School, Nervesa della Battaglia, World War I, Italy, 20th century / Bridgeman Images

DGA3953061: 240 L trench mortar post, Trench Mortars School in Susegana, World War I, Italy, 20th century / Bridgeman Images

DGA3953066: Cart with two 58A and cart with two 58B trench mortars, Trench Mortars School in Susegana, World War I, Italy, 20th century / Bridgeman Images

DGA3953075: Rifle grenade launching, Trench Mortars School in Susegana, World War I, Italy, 20th century / Bridgeman Images

DGA3953089: Workers and horse in tunnel, construction of the Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953090: Excavation in vault, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953092: Workers dedicated to construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953102: Iron gate at 9674 meters, Italian side, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953104: Interior facade of Domodossola station, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953106: Cold springs in tunnel II at 4442 m, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953109: South portal of Iselle, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953111: Lifting of stones for vault masonry, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953113: Crosspiece, construction of Simplon Tunnel, 1898-1905, Italy-Switzerland, 19th-20th century / Bridgeman Images

DGA3953136: Portrait of Onofrio Scassi (1760-1836), Italian physician, engraving by Monsaldi, Italy, 18th-19th century / Bridgeman Images

DGA3953143: Portrait of Giacomo Filippo Pelandi, Italian physician of 17th century engraving / Bridgeman Images

DGA3953148: Portrait of Isaac Newton (1642-1727), British mathematician, physicist, astronomer, engraving by Seemann and Baumann / Bridgeman Images

DGA3953155: Portrait of Carl von Linne known as Linnaeus (1707-1778), Swedish physician, botanist and naturalist, engraving by Spagnoli / Bridgeman Images

DGA3952960: Austrian biplane brought down after aerial combat, photo found on Austrian prisoner, World War I, Italy, 20th century / Bridgeman Images

DGA3952962: Austrian biplane brought down after aerial combat, photo found on Austrian prisoner, World War I, Italy, 20th century / Bridgeman Images

DGA3952967: Gondola and part of shell of M12 airship fallen into sea in Grado lagoon on July 23, 1917, Belvedere quay, Grado, World War I, Italy, 20th century / Bridgeman Images

DGA3952974: Freight train at Brenner, 1918, World War I, Italy, 20th century / Bridgeman Images

DGA3953003: Aerial view of trenches at Gallio, December 8, 1917, World War I, Italy, 20th century / Bridgeman Images

DGA3953009: Aerial view of San Dona di Piave few days before Italian offensive, October 8, 1918, World War I, Italy, 20th century / Bridgeman Images

DGA3953010: Aerial view of Pasubium massif covered in snow, World War I, Italy, 20th Century / Bridgeman Images

DGA3953011: Aerial view of bridge destroyed near Ponte di Piave, World War I, Italy, 20th century / Bridgeman Images

DGA3953012: Aerial view of Austrian footbridge on Piave River in Salgareda, trenches and bomb craters, World War I, Italy, 20th century / Bridgeman Images

DGA3953016: Aerial view of trenches at Gallio, December 1917, World War I, Italy, 20th century / Bridgeman Images

DGA3953025: Aerial view of bombardment of airfield of Santa Giustina, May 1918, World War I, Italy, 20th century / Bridgeman Images

DGA3953038: Aerial view of Vienna Parliament, World War I, Austria, 20th century / Bridgeman Images

DGA3952860: Soldiers of Genius laying footbridge over Piave River, 1918, World War I, Italy, 20th century / Bridgeman Images