ROME – The Italian government has successfully negotiated with our American museums and private collectors to return to what it says are looted antiquities. However, you will find the Ny Carlsberg Glyptotek, an art museum in Copenhagen, more difficult to break.

Conversations with the Glyptotek has dragged for months, although “the budgets for the negotiations are identical to those carried out with the Americans,” said Maurizio Fiorilli, the Italian lawyer of the state involved in the negotiations. Glyptotek, however , has “taken a very different,” he said.

At the heart of the dispute Greco-Roman and Etruscan objects Glyptotek acquired by Robert Hecht, an antiquities dealer from now on trial in Rome, where he is accused of receiving and selling stolen property and conspiracy in the trade in antiquities. He denies any wrongdoing.

The Italians used the testimony of Mr. Hecht’s point of view, and the trial of the antiquities dealer Giacomo Medici, who was convicted of receiving and smuggling of archaeological objects to convince several institutions – including the Metropolitan Museum of Art New York, and J. Paul Getty Museum in Los Angeles – to return the objects to Italy on suspicion they were illegally excavated. (Mr. Medici is appealing his conviction.)

Italy The campaign is based on a UNESCO convention in 1970, which prohibits the illicit traffic of cultural property in the country. It is generally accepted that the world of antiques that arose after that date without provenance established should not be purchased. In addition, a 1909 Italian law stipulates that nothing found in Italy belongs to the state meters.

Mr. Hecht, in the last hearing last month, the correspondence of the early 1970s, between him and former Glyptotek officials regarding the sale of dozens of objects for the museum – which includes one or two Etruscan Calessi wheel carriage, excavations near Fara Sabina, just north of Rome – was introduced in evidence against him.