The portrait of Christ, which became the most expensive painting ever after a sale by Christie’s auction house, was scheduled to be on display at a new branch of the Louvre in Abu Dhabi from Sept. 18. The authorities did not specify a reason for the delay.

The Abu Dhabi state-linked newspaper, The National, reported the museum might wait until the first anniversary of its opening in November to unveil the painting, which was purchased last year for $450.3 million by an unidentified buyer.

A report in the Wall Street Journal said that Saudi Crown Prince Mohammed bin Salman was identified as the buyer of the painting in U.S. intelligence reports, according to people with direct knowledge of the information, even as the 33-year-old son of the king pushes ambitious economic reforms that include austerity measures.

A Saudi official denied that report at the time, and a document seen by Reuters showed that Saudi Prince Badr bin Abdullah bin Farhan, a relative of the crown prince who subsequently became the kingdom’s first culture minister, had been authorized to make the purchase on behalf of the Abu Dhabi Department of Culture and Tourism.

The painting, only recently rediscovered, was the last da Vinci left in private hands and fetched more than four times Christie’s pre-sale estimate of about $100 million.