Denarius Princeps Juventutis, the first of youths, was an honorary title given to young princes of the imperial family that were destined to reign.
Roman Imperial
Domitian (81-96), Denarius as Caesar 80, Rome mint
Obverse: laureate head right
CAESAR DIVI F DOMITIANVS COS VII
Reverse: Cretan goat standing left in laurel wreath
PRINCEPS IVVENTVTIS
Weight 3.35 g