Obverse with laureate and cuirassed bust of Constantine I facing right, draped over the shoulder and seen three-quarters from the front; legend CONSTANTINVS P F AVG (“Constantinus Pius Felix Augustus”). Reverse depicting Sol Invictus, radiate and nude, with cloak over the shoulder, standing right and facing left, raising the right hand and holding a globe in the left; legend SOLI INVICTO COMITI (“To Sol Invictus, the companion”), mintmark BTR in the exergue. The type emphasizes divine favor and imperial authority through association with the invincible sun god. Historical context: Constantine I emerged as sole ruler after the collapse of the Tetrarchic system. In the early years of his reign he employed traditional solar imagery, especially Sol Invictus, to express divine support and universal power. His later reforms, including the Edict of Milan (AD 313) and the foundation of Constantinople, permanently reshaped the Roman world.