The Athenian tetradrachm is a silver coin that was widely used in ancient Athens around the 5th century BCE. It typically weighed about 17.2 grams and featured the image of the goddess Athena on one side, symbolizing wisdom and warfare. The reverse side often depicted an owl, representing knowledge, along with an olive branch. These coins played a crucial role in trade and commerce throughout the Mediterranean region. The Athenian tetradrachm became a standard currency, influencing other city-states and contributing to the economic power of Athens during its Golden Age.