Long-Lost Mosaic From a ‘Floating Palace’ of Caligula Returns Home


NEMI, Italy — If stones could speak, the mosaic unveiled recently at an archaeological museum just south of Rome would have quite the tale to tell.

It was crafted in the first century for the deck of one of two spectacularly decorated ships on Lake Nemi that the Emperor Caligula commissioned as floating palaces. Recovered from underwater wreckage in 1895, the mosaic was later lost for decades, only to re-emerge several years ago as a coffee table in the living room of a Manhattan antiques dealer.

“If you look at it from an angle, you can still see traces of a ring from a cup bottom,” said Daniela De Angelis, the director of the Museum of the Roman Ships in Nemi, referring to the piece’s modern use. The mosaic has been installed in the museum next to two other marble fragments salvaged from Caligula’s ships, and was put on display on Thursday.


“For us it’s a great satisfaction today to see the mosaic in this museum,” said Maj. Paolo Salvatori of Italy’s elite art theft squad, whose investigations led to the mosaic’s return. “Bringing back cultural artifacts to their original context” is the ultimate goal of the squad, he said, and the recovery of the mosaic reflected cooperation among the squad, Italy’s cultural authorities and law enforcement in the United States.

Caligula’s rule only lasted from A.D. 37 to 41, but he enthusiastically embraced the trappings of the position, including an opulent residential compound on the Esquiline Hill in Rome, a villa on the southwest shore of Lake Nemi and the two ships.

“They were floating palaces,” whose “aquatic luxury” was likely inspired by a renowned barge used by Antony and Cleopatra on the Nile, said Massimo Osanna, the director general of Italy’s national museums.

Scholars are still unsure whether the ships had a specific purpose, though some have posited that one was used for the worship of the Egyptian goddess Isis. In any case, Caligula didn’t skimp on the ships’ décor, which included mosaics on the walls, intricately inlaid marble floors, decorated fountains and marble columns. Bronze figures decorated the beams, headboards and other wooden parts.

If ancient sources are to be believed, Caligula was a deranged and despotic ruler with a voracious sexual appetite and a vicious streak of cruelty, but modern scholarship has thrown doubt on those accounts.


“There’s a lot of fake news about Caligula,” said Barry Stuart Strauss, a professor of history and classics at Cornell University. “I don’t want to make him out to be a nice guy or something,” he said, because Caligula executed a number of senators, had a sharp tongue and made many enemies. And when Caligula was assassinated in A.D. 41, “it wasn’t difficult to find people who wanted to assassinate him,” Prof. Strauss added. “But we can’t trust the myths.”

With Caligula’s death, the ships were destroyed and sank to the bottom of the lake. Various attempts to raise them over the centuries were unsuccessful, as well as damaging, and the wrecks were repeatedly plundered, Ms. De Angelis said.

In 1895, the antiquarian Eliseo Borghi managed to recover part of the ship’s decorative bounty, including some of the bronze decorations and parts of the marble floor. These items — including the recently returned mosaic, which he had restored using fragments of ancient marble integrated with modern pieces — were sold to museums in Italy and elsewhere in Europe, as well as to private collectors.


The location of the deck mosaic would have likely remained unknown had it not been for the 2013 presentation in New York of a book by an Italian marble expert, Dario Del Bufalo, on the use of red porphyry in imperial art. He happened to show a photograph of the missing mosaic.

“That’s Helen’s table,” Mr. Del Bufalo recalled one of the attendees exclaiming. Helen turned out to be Helen Costantino Fioratti, president of L’Antiquaire and the Connoisseur, a Manhattan fine art and antiques gallery.


Mr. Del Bufalo said Thursday that he had assisted Italy’s art theft squad in identifying Ms. Fioratti’s mosaic as the section of the marble floor restored by Mr. Borghi. The piece was seized by American authorities in 2017 and returned to Italy. Ms. Fioratti said at the time that she and her husband had bought the mosaic in good faith, in the late 1960s, from a member of an aristocratic family.

“She cared a lot about that table,” Mr. Del Bufalo said Thursday. He said that the marble had been seized because Ms. Fioratti could not prove that it had been legally exported to the United States. She was never charged with any crimes in Italy.

Caligula’s ships were finally recovered between 1929 and 1931, after the lake was drained, an enterprise that exemplified “the highest feat of Italian hydraulic engineering,” said Alberto Bertucci, mayor of Nemi, which is arguably better known for its strawberries than its archaeological heritage.

The Nemi museum was specially designed in the 1930s to house the massive ships — which measured roughly 240 feet long and 78 feet wide — as well as other artifacts dredged up at the time, including fragments of mosaics and brass tiles that covered the roof of a structure on one of the ships.

But on the night of May 31, 1944, the ships were destroyed by a fire that scholars believe was deliberately set by vengeful German troops.


“There was little left afterward because the fire was devastating,” said Ms. De Angelis. But some artifacts survived because they had been sent to Rome for safekeeping.

“The fire in the museum was ignited to destroy, and it did not disappoint,” said the Rev. John McManamon, a visiting scholar at the Institute of Nautical Archaeology at Texas A&M University, who has written a book on the ships that is scheduled to be published next year. Father McManamon’s research backed the conclusions of a 1944 investigative commission which found that “in all likelihood, the fire that destroyed the two ships was caused by a deliberate choice on the part of the German soldiers,” he wrote in an email.

Mr. Bertucci said he had initiated discussions with Italy’s Foreign Ministry about demanding compensation from the German government for the destruction of the ships. Any money received would be used to build scale models of the ships and to “return to humanity what was lost,” he said in an interview this week.

“Today is a very important day,” said Ms. De Angelis at the Thursday unveiling. “Visitors to the museum will find a new addition in its natural place, alongside other marble fragments from the ship, as if it had never been away.”

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