This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Zahn Oculus artificialis teledioptricus sive Telescopium .tif Book Zahn Johann Oculus artificialis teledioptricus sive Telescopium sumptibus Quirini Heyl bibliopolae aulicoacademici Herbi Poli lat it Oculus artificialis teledioptricus sive Telescopium ex abditis rerum naturalium artificialium principiis protractum nova methodo