An Apulian vase, dating back to the 4th Century B.C., is one of 14 artworks to be returned to Italy by the Cleveland Museum of Art. (Italian Culture Ministry/Associated Press)The Cleveland Museum of Art agreed Wednesday to return 14 ancient treasures ranging from Etruscan jewelry to a medieval cross that authorities say were looted or stolen from Italy.

Italian Culture Ministry officials and the director of the Cleveland museum signed a deal in Rome to transfer the artifacts within three months in exchange for long-term loans of other treasures.

The agreement is the latest success in an Italian campaign to recover artifacts that survived for centuries, only to be dug up by looters, smuggled out of the country and sold to museums across the world.

Similar deals have yielded the return of scores of pieces from museums, including the J. Paul Getty Museum in California and the Metropolitan Museum of Art in New York.

Director Timothy Rub stressed that the Cleveland museum had not knowingly acquired or received looted items. He said they were bought or donated to the museum in the 1970s and 1980s.

Objects of great historical, artistic interest

The treasures to be returned from Cleveland are mostly a sampling of art produced by the Etruscans and by Greek-influenced cultures that dominated central and southern Italy before the rise of Rome.

The objects are "of great historical, artistic and archeological interest," Italian Culture Minister Sandro Bondi said.

Among them are a pair of Etruscan silver bracelets from the sixth century BC and a bronze statue of a horned warrior, dated to the ninth or eighth century BC, which experts said is one of the finest remaining from a civilization that populated the island of Sardinia.

Most of the artifacts are elaborate and richly decorated pottery pieces from fifth to fourth century BC southern Italy.

A Greek donkey-head vessel dating from 475 BC was part of the Cleveland Museum collection until Italy provided evidence it had been looted. (Cleveland Museum of Art/Associated Press)They include vessels shaped as a donkey head, a pig and a duck as well as a one-metre-tall vase attributed to the so-called painter of Darius — an artist named after one of his works depicting the ancient Persian king.

Also in the group is a 14th century gold-plated processional cross stolen in the 1960s from a church near Siena, in Tuscany.

The evidence the artifacts were looted included photos and documents related to them found in raids conducted in the 1990s on the Swiss warehouses of antiquities dealers accused of controlling the flow of illegal art exports from Italy. The raids sparked what has turned into a worldwide hunt for Italy's lost treasures.

The deal signed at the Culture Ministry came after nearly two years of negotiations that began when the museum contacted the Italians to check if Rome was seeking to recover any of its antiquities.

"When putting together a collection it is important that any museum acquire works ethically," Rub said.

Bondi and Rub said the two sides had established a joint commission to determine the provenance of two more contested pieces: a statue depicting Nike, the winged victory deity, and a bronze of the Greek god Apollo.