https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/2273215Edit ImageSaveSaveEditCropCustom TextCalcispongiae–Kalkschwämme from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally enhanced by rawpixel.MorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFPortrait Card 5 x 7" JPEG 1429 x 2000 px | 300 dpiLarge JPEG 2500 x 3500 px | 300 dpiBest Quality JPEG 5418 x 7584 px | 300 dpiPortrait Card 5 x 7" TIFF 1429 x 2000 px | 300 dpiBest Quality TIFF 5418 x 7584 px | 300 dpi | 235.16 MBFree DownloadCalcispongiae–Kalkschwämme from Kunstformen der Natur (1904) by Ernst Haeckel. Original from Library of Congress. Digitally enhanced by rawpixel.More