Allmanach auff das 1581 jar ... / Durch Petrum Slovacium gestellet auff den Meridian der kayserlichen Stadt Breslaw. https://www.rawpixel.com/image/13982780/image-background-paper-personFree Image from public domain licenseWashington, D.C. Circular stairway in Meridian Hill Park, 16th Street, N.W.. Sourced from the Library of Congress. https://www.rawpixel.com/image/12323659/image-shadow-plant-personFree Image from public domain licenseWashington, D.C. The bronze sundial in Meridian Hill Park. Sourced from the Library of Congress. https://www.rawpixel.com/image/12323670/image-plant-person-skyFree Image from public domain license