Faraday's Electromagnetic rotation experiment — ca 1821 Photo Credit: By Michael Faraday - Experimental Researches in Electricity (volume 2, plate 4), Public Domain, https://commons.wikimedia.org/w/index.php?curid=4134268
Otto III, Holy Roman Emperor — Photo Credit: By Meister der Reichenauer Schule - The Yorck Project (2002) 10.000 Meisterwerke der Malerei (DVD-ROM), distributed by DIRECTMEDIA Publishing GmbH. ISBN: 3936122202., Public Domain, https://commons.wikimedia.org/w/index.php?curid=155171
Bolesław II Pobożny — Heavily retouched by alasnome Photo Credit: By anonymous fresco in Znojmo (CZ) - web, Public Domain, https://commons.wikimedia.org/w/index.php?curid=6563475
Boleslav-I-Bohemian — Photo Credit: By Känsterle (Overleg) - unknown (moved here from http://nl.wikipedia.org/wiki/Afbeelding:BoleslavIB2.jpg), CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1670058
Wenceslaus I, Duke of Bohemia — Equestrian statue in Prague, Czech Republic, sculpted by Josef Václav Myslbek Photo Credit: By Ales Tosovsky - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1191869