MADISON, Wis. -- By any measure, the ancient city of Sardis -- home of the fabled King Croesus, a name synonymous with gold and vast wealth, and the city where coinage was invented -- is an archaeological wonder.
The ruins of Sardis, in what is now Turkey, have been a rich source of knowledge about classical antiquity from the 7th century B.C., when the city was the capital of Lydia, through later Greek and Roman occupations.
Now, however, Sardis has given up another treasure in the form of two enigmatic ritual deposits, which are proving more difficult to fathom than the coins for which the city was famous.
"The two deposits each consist of a small pot with a lid, a coin, a group of sharp metal implements and an egg, one of which is intact except for a hole carefully punched in it in antiquity," explains Will Bruce, a classics graduate student a the University of Wisconsin-Madison who has been digging at Sardis for the past six years. Bruce made the finds last summer.
The dig at Sardis is overseen by Nicholas Cahill, a UW-Madison professor of art history. Cahill has directed field research at Sardis for decades. Both ritual deposits, says Cahill, date from the Roman era of Sardis, about A.D. 70 or 80.
Bruce and his team were excavating below the floor of a first century room, built over the ruins of an earlier building, which had probably been destroyed in a massive earthquake in A.D. 17.
Digging beneath the floor, Bruce and his colleagues first uncovered a thin-walled, nearly intact jug and, nearby, an assemblage of mostly unbroken pottery. "It looked like we were reaching a more intact deposit instead of fill," says Bruce.
Within that assemblage, Bruce began to carefully uncover an inverted bowl, which turned out to be sitting on top of another bowl. The bowls, still filled with dirt, were carefully removed and immediately turned over to conservators who cleaned and dissembled them to find a set of small pointed instruments, a coin with a lion and portrait of Nero, and the intact egg.
"The ritual offerings were dug into pits in the floor, after the room was constructed," says Cahill. "We know they were renovating the room periodically, because in another part of the space there was a dump of painted wall plaster buried under the floor, presumably in a renovation."
"The meaning of these deposits is still quite open to interpretation," notes Cahill, "but burying votive deposits below ground or in a wall was a fairly common practice," perhaps as a ritual offering to protect the house. Roman literary sources suggest eggs were used in particular rituals.
For the archaeologists, part of the intrigue is that similar groups of bowls, needles, coins and eggs were discovered at Sardis more than 100 years ago when the temple of Artemis was excavated by Princeton University archaeologists. "It is an exact parallel to what they found in the early 20th century," according to Cahill.
The coin was also unique. Sardis is famous as the place where coinage was invented in the Western world, first using electrum, an alloy of silver and gold, and later of pure gold and silver. Nearby sources of gold made ancient Lydia, and King Croesus, fabulously wealthy. While these Lydian coins are very rare, coins and coin hoards from later Greek and Roman occupiers of Sardis are routinely found.
But the coin found with the egg, says Cahill, seems to be special.
"The coin has a portrait of Nero on the front. The original reverse was hammered flat, and the image of a lion engraved in its place, which is very odd." Expert numismatists have never seen anything like it. "The image of the lion is important because it is emblematic of the Lydian kings and of their native mother goddess Cybele," Cahill says.
The discovery is unusual, Cahill notes, because finding ritualistic objects intact and in place after thousands of years is no everyday discovery, even in a rich archaeological context such as Sardis. "Ancient ritual was important to people. It is most unusual to find such fragile things so perfectly preserved."