A gold necklace, recovered from the sunken Titanic’s wreck site, has been stolen from an exhibition dedicated to the ill-fated ship, in the Danish capital of Copenhagen.

The necklace, which belonged to a first-class passenger named Eleanor Wildener, was stolen on Sept. 17 during the exhibition's opening hours, the exhibitors at Tivoli Gardens amusement park, where Titanic - The Exhibition is currently on display, said.

The precious necklace belonged to the Wildener family, who were one of the richest families onboard the Titanic in 1912,” Torben Plank, the PR manager from Tivoli, said in a statement.

According to authorities, one or more thieves could have managed to gain access to the display case containing the rare and precious necklace, valued at approximately $18,750. However, Plank cautioned that the estimated value of the chain could turn out to be even more, if it were sold at an auction. He also spoke about the impossibility of the thieves selling the necklace, because of its international renown.

We have got photos of all the visitors who visited the Exhibition on the day. We have sent all the photos to the police. We know this must be on one of them, Plank said, adding that they have also received calls from a lot of visitors who have told certain things about other guests that might be helpful in getting the thief.

A reward of about $1,340 has been announced for any person, for information leading to the retrieval of the necklace.

The exhibition at the Tivoli amusement park in Copenhagen opened to visitors in April 2011 and has attracted over 50,000 visitors so far. The exhibition, at the Hans Christain Andersen Castle, will remain open until Dec.30.

The exhibition showcases artifacts, a model of the ship as well as models of interiors and many rare photographs of the Titanic, which set sail on its maiden voyage, from Southampton, England to New York City with 2,223 people on board.

The year 2012 marks the centenary year of the sinking of Titanic, hailed as an unsinkable vessel on its launch, following a collision with an iceberg in the middle of the Atlantic Ocean, on April 15, 1912 and the loss of over 1,500 passengers.

The

The gold necklace before it was stolen from Copenhagen exhibition belonged to Wildener family, one of the richest families on board the Titanic in 1912. PHOTO CREDIT: TIVOLI GARDENS