Police raiding a house in the Paris suburb of Champigny-sur-Marne on June 15 got a welcome surprise when they stumbled upon a stolen Pablo Picasso painting.

Though the specific canvas has not yet been identified, it is reported to depict the artist’s lover and muse Marie-Thérèse Walter, reports Le Parisien, which indicates that the canvas, valued between about $13.7 million and $17.1 million, belongs to a collector from Singapore. It was allegedly stolen by a worker at an art storage facility in Paris, who claims he did it to highlight security flaws, per the outlet.