Laureate, draped and cuirassed bust of Constantine I facing right. Legend: IMP CONSTANTINVS AVG (Imperator Constantine Augustus) The Roman state deity (often Sol or a personification of Roman renewal, depending on the exact type), standing, holding symbolic attributes of stability and prosperity; reverse type associated with imperial renewal and authority. Legend: varies by issue (commonly imperial virtues or renewal formulas). Mintmark: Treveri (TR / PTR / STR variants in the exergue, depending on emission). Historical Context Constantine I, later known as Constantine the Great, was one of the most influential emperors in Roman history. Rising to power during the Tetrarchic period, he eventually emerged as sole ruler of the Roman Empire after defeating his rivals. His reign marked a turning point in antiquity, most notably through the Edict of Milan (AD 313), which granted religious tolerance to Christianity, and through his foundation of Constantinople, destined to become the capital of the Eastern Roman Empire.