For the Louvre, the world's most visited museum, it is "statistically inevitable" that fraud would come up at some point, the museum's No. 2 said in the wake of a decade-long, 10 million euro ($11.8 million) suspected ticket-fraud scheme revealed last week.

Kim Pham, the Louvre's general administrator, told The Associated Press that the museum's unique scale makes it particularly vulnerable. However, pressed to name other institutions with similar problems, he declined to single out peers.