(Foto des U.S. Marine Corps von Lance CPL. Andrew D. Young) (veröffentlicht)
Public domain scan of a medieval manuscript, free to use, no copyright restrictions image - Picryl description.
Public domain reproduction of Italian art print, 16th-17th century, free to use, no copyright restrictions image - Picryl description.
Public domain image of horse riding, equestrian activity, animal husbandry, 18th-19th century, 17th century, free to use, no copyright restrictions image - Picryl description.
Public domain photo of Italian sculpture, free to use, no copyright restrictions image - Picryl description
Titelseite in: Conicorum / Apollonius Pergaeus. Oxoniae: E. Theatro Sheldoniano. 1710. Veröffentlicht in: The tradition of science / Leonard C. Bruno. Washington, D.C.: Library of Congress, 1987, S. 228.