Nummus - Crispus as Caesar Laureate, CRISPVS NOB CAES, BEATA TRANQVILLITAS, PLON, Londinium

Crispus, Constantine's eldest son by his concubine Minervina, was elevated to Caesar in 317 AD and proved himself a genuinely capable commander — his naval victory over Licinius at the Hellespont in 324 was decisive in ending the civil war. The BEATA TRANQVILLITAS ("blessed tranquility") reverse type was introduced across western mints in 320–321 as deliberate propaganda following the rupture with Licinius, projecting an image of stability that the empire conspicuously lacked. Within four years of this coin's striking, Constantine had Crispus executed at Pola — the reasons remain historically obscure, though the involvement of his stepmother Fausta is frequently cited.