Coin image of Sponsianus.
Sponsianus
CC BY 4.0
Pearson PN, Botticelli M, Ericsson J, Olender J, Spruženiece L (2022) Authenticating coins of the ‘Roman emperor’ Sponsian. PLoS ONE 17(11): e0274285. <a rel="nofollow" class="external free" href="https://doi.org/10.1371/journal.pone.0274285">https://doi.org/10.1371/journal.pone.0274285</a>