Tetradrachm (4 Drachms): Ancient Greek & Indian Coins

Illustrated Specimen Details: Copper Tetradrachm

Example Specimen: Tetradrachm, 155-187 (Kushan Empire)

Authority & Heraldry: The obverse of the coin depicts the Kushan emperor Huvishka riding an elephant and holding an ankus (elephant driver's tool). The circular legend in the Bactrian language (using the Greek alphabet) reads: þAONANOþ OOηþKE KOþANO (Huvishka — King of Kushan Kings). The reverse features the figure of a deity with the mistakenly indicated name of the moon god MAO, however, iconographically, it depicts another Kushan deity — Oesho (Bactrian "Οηϸο", similar to the Indian Shiva) or Athsho (god of metals and fire). On the left, the royal tamga of the Kushan ruler in the form of a trident is clearly visible.

1. ANCIENT GREECE (6th-1st centuries BC): 1 tetradrachm = 4 drachms
2. ROMAN PROVINCES (2nd century BC-3rd century AD): 1 tetradrachm = 4 drachms (equal to 3 or 4 Roman denarii)
3. KUSHAN EMPIRE & ANCIENT INDIA (3rd century BC-4th century AD): 1 tetradrachm = 4 drachms
4. CELTS OF CENTRAL EUROPE (4th-1st centuries BC): 1 celtic tetradrachm = 4 drachms
5. PTOLEMAIC EGYPT (5th-1st centuries BC): 1 tetradrachm = 4 drachms

The name of the tetradrachm coin derives from the ancient Greek word "τετράδραχμον", which literally translates to "four drachmae" (from the Greek "tetra" — four, and "drachme"). This term historically defined a large silver coin of Ancient Greece. However, in numismatics, this name is also applied to specific regional issues minted far beyond the Hellenic world, which could be made even of base metals such as copper or bronze.

History and Evolution of the Tetradrachm Denomination

The tetradrachm was one of the most important and popular coins of the ancient world. It originated in the ancient Greek city-states and subsequently became the main trade currency of the entire Mediterranean and the Middle East. Its influence spread far beyond modern Europe, reaching Central Asia and the borders of ancient India.

In numismatics, tetradrachms are clearly divided by regions and eras of issue: from the classic silver Athenian "owls" to Roman provincial coins and special copper issues of the Kushan Empire. Over the centuries, not only the metal but also the weight standards of this coin changed, yet its nominal essence remained the same.

The monetary system was based on a strict decimal or fractional ratio:

• 1 tetradrachm = 4 drachms
  → therefore 1 drachm = 1/4 tetradrachm

The Classical Era and Greek Origins (6th-1st Centuries BC)

The first tetradrachms were minted in Athens at the beginning of the 6th century BC. The Athenian tetradrachm, featuring the goddess Athena and her symbol — the owl — became the first true international currency of the world due to the stable, high quality of silver from the Laurion mines. Ancient merchants accepted these coins without checking their weight throughout the Mediterranean.

The denomination reached a new scale of distribution during the conquests of Alexander the Great in the 4th century BC. His tetradrachms depicting Heracles in a lion's skin were minted at dozens of mints from Greece to Babylon. Alexander's successors (the Diadochi) in the Seleucid and Ptolemaic empires continued this tradition, establishing the tetradrachm as the foundation of the financial systems of the Hellenistic world.

Eastern Expansions and the Kushan Empire (1st-4th Centuries AD)

The cultural and economic legacy of Hellenism took deep root in Central Asia through the Indo-Greek and Indo-Scythian kingdoms. It was this historical connection that led to the appearance of tetradrachms in the monetary circulation of the Kushan Empire — a vast ancient state that united the territories of modern India, Pakistan, Afghanistan, and Uzbekistan.

Unlike the classic Mediterranean prototypes, Kushan tetradrachms from the time of the great rulers Kanishka and Huvishka were minted primarily from copper or bronze, but they retained a substantial weight (about 15-16 grams). The design of these coins is unique: the obverse depicted the king (standing at an altar or riding an elephant), while the reverse featured a rich pantheon of deities, combining Greek, Persian, and Indian religious motifs, reflecting the cultural diversity of the Silk Road.

Numismatic Perspective

For modern collectors, the tetradrachm denomination opens up a colossal field for research, as it demonstrates a unique continuity of financial identity across eras:

• classic Attic silver standard (Athens, Macedonia)

• Roman provincial billon and potin issues (mints of Alexandria, Antioch)

• the Kushan type of large copper coin, which preserved the name of the Greek denomination in a completely different culture

Kushan copper tetradrachms are a valuable historical source. The inscriptions on them, written in the Bactrian language using the Greek alphabet, help historians accurately reconstruct the chronology of the kings' reigns, and the changing deities on the reverses illustrate the religious transformations of ancient India.