https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14011073Edit ImageSaveSaveEditCropCustom TextCivil engineering: a double-tiered aqueduct over a river valley. Engraving by L. Sellier after Foucherot.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 817 px | 300 dpiLarge JPEG 3306 x 2251 px | 300 dpiFree DownloadCivil engineering: a double-tiered aqueduct over a river valley. Engraving by L. Sellier after Foucherot.More