When the staff at Kunsten Museum of Modern Art in ??northern Denmark opened boxes last week from artist Jens Haaning, they expected to see pieces featuring the half-million kroner they lent him for the works of art, the director told a Danish radio show host.

Instead, the museum — which had commissioned Haaning to re-create two of his older pieces that were made with cash — found two empty frames. 

The new name for the artwork: "Take the Money and Run."

Now, the museum in ??Aalborg, Denmark, is accusing him of breaking their legal agreement and demanding the artist return the 534,000 kroner, the equivalent of over $84,000.

"The work is that I have taken their money," Haaning said in an interview with Danish radio show "P1 Morgen."

The 56-year-old resident of Copenhagen gained popularity in the 1990s. He is known for using art as commentary on money, power and marginalized groups, according to the Faurschou Foundation, a Copenhagen-based art museum.