Saudi Arabia’s Crown Prince Mohammed bin Salman was the mystery buyer of a luxury French house, according to reporting by the New York Times.
The newspaper says a paper trail from a 2015 purchase leads back to him through several shell companies.
The house, near Versailles, has a wine cellar, a cinema and a moat with koi, sturgeon and an underwater chamber.
It cost €275m ($320m, £240m) and Fortune magazine called it the world’s most expensive house.
The buyer was unknown at the time.
But the New York Times reports that documents showed the house was owned by an investment company managed by Prince Mohammed’s personal foundation.
The Saudi government has declined to comment on the report.
A spokeswoman for the Saudi embassy in Washington accused New York Times journalists of “subjective reporting” and serving a “personal agenda”.
From the exterior, the Chateau Louis XIV appears to be a 17th-Century chateau, constructed in a similar style to the nearby palace at Versailles.
On closer inspection, however, this is not the case: it was built after developer Emad Khashoggi demolished a 19th-Century building that had previously stood on the 57-acre (23-hectare) site and is modern inside. According to reports, its fountains and air conditioning, as well as lights and music, can be controlled by smartphone.
A local official told the New York Times: “The idea is tacky, and then once you visit it isn’t.”
In 2015, Prince Mohammed reportedly bought himself a yacht from a Russian businessman for $590m.