Civil engineering: the Pont Cysylte aqueduct, the aqueduct at Pyrgos, the aqueduct at Roquefavour and the Colosseum at Rome. Engraving.

Licence: Public Domain Mark

Credit: Civil engineering: the Pont Cysylte aqueduct, the aqueduct at Pyrgos, the aqueduct at Roquefavour and the Colosseum at Rome. Engraving. Wellcome Collection. Source: Wellcome Collection.