"De revolutionibus libri sex" of the astronomer <a href="https://en.wikipedia.org/wiki/Nicolaus_Copernicus" class="extiw" title="w:Nicolaus Copernicus">Nicolaus Copernicus</a> (1473–1543) from Jagiellonian Digital Library at <a href="https://en.wikipedia.org/wiki/Jagiellonian_University" class="extiw" title="w:Jagiellonian University">Jagiellonian University</a> in Cracow
<bdi><a href="https://en.wikipedia.org/wiki/en:Nicolaus_Copernicus" class="extiw" title="w:en:Nicolaus Copernicus"><span title="Polish mathematician and astronomer (1473–1543)">Nicolaus Copernicus</span></a>
</bdi>
circa 1520 <div style="display: none;">date QS:P571,+1520-00-00T00:00:00Z/9,P1480,Q5727902</div>
<a rel="nofollow" class="external free" href="https://jbc.bj.uj.edu.pl/dlibra/publication/1494/edition/858/content">https://jbc.bj.uj.edu.pl/dlibra/publication/1494/edition/858/content</a>