The country’s largest Christian university is being fined $37.7 million by the federal government amid accusations that it misled students about the cost of its graduate programs.

Grand Canyon University, which has more than 100,000 students, mostly in online programs, faces the largest fine of its kind ever issued by the U.S. Education Department. The university dismissed the allegations as “lies and deceptive statements.”

“Grand Canyon University categorically denies every accusation in the Department of Education’s statement and will take all measures necessary to defend itself from these false accusations,” the school said in a five-page statement.

An Education Department investigation found that Grand Canyon lied to more than 7,500 current and former students about the cost of its doctoral programs.