Around 270 CE, King Endubis of the Aksumite Kingdom introduced a coinage system, minting gold, silver, and bronze coins bearing his portrait and inscriptions in Greek and Ge'ez. Positioned at Red Sea trade crossroads between Rome, Arabia, India, and East Africa, Aksum developed the only sub-Saharan African coinage of antiquity issued without direct outside cultural influence. The coins facilitated international trade and served as royal propaganda. Later rulers used coin inscriptions to signal religious shifts, making Aksumite coinage a record of the kingdom's political and spiritual changes.