<bdi><a href="https://en.wikipedia.org/wiki/en:Piero_della_Francesca" class="extiw" title="w:en:Piero della Francesca"><span title="Italian painter and mathematician (c. 1416-1492)">Piero della Francesca</span></a>
</bdi>
circa 1440-1450
book: B. Laskowski, <i>Piero della Francesca</i>, 2007