[Loyalist soldiers walking with rifles, University City, Madrid]

[Republican soldiers camping in a physics laboratory, University City, Madrid]

Ruins of the University Library at Louvain after the Germans sacked the city

[Republican officer and Gerda Taro (right), University City, Madrid]

[Two Republican soldiers eating in a laboratory, University City, Madrid]

[Members of the International Brigades defending a building in the University City, Madrid]

[Republican soldiers camping in a physics labratory, University City, Madrid]

[Republican soldiers camping in a physics labratory, University City, Madrid]

[Members of the International Brigades defending a building in the University City, Madrid]

[Republican soldiers camping in a physics laboratory, University City, Madrid]

[Republican soldiers firing machine guns, University City, Madrid]

[Member of the International Brigades defending a building in the University City, Madrid]

[Republican soldier aiming rifle through a wall, University City, Madrid]

[Republican soldier aiming rifle through wall, University City, Madrid]

[Republican soldier helping wounded comrade to safety, University City, Madrid]

Darius Milhaud, French composer, teaching at the University of Iowa, Iowa City

[Republican soldier aiming rifle through peephole, University City, Madrid]

[Member of the International Brigades behind a barricade, in or around University City, Madrid]

[Republican soldier stepping through a hole in a wall, University City, Madrid]

[Republican soldiers aiming rifles through window, University City, Madrid]

[Republican soldiers behind barricade made of sandbags and luggage, University City, Madrid]

[Republican soldiers aiming machine guns through peepholes, University City, Madrid]

[Members of the International Brigades with guns behind a barricade, in or around University City, Madrid]

[Republican soldiers aiming machine guns through peepholes, University City, Madrid]