The mystery over who put big white flags on the Brooklyn Bridge last month may be solved.
A pair of German artists are claiming responsibility for the stunt.
Mischa Leinkauf and Matthias Wermke say they only wanted to celebrate the beauty of public space.
They say they did it to honor the bridge's engineer, German-born John Roebling, who died on July 22, 1869 and his son, who died on July 21, 1926.
That's why they picked the early morning hours of July 22 to swap out the flags.
They say they folded the American flags they took down according to code and will return them soon.