An Austrian museum says a man took the concept of life imitating art to an extreme when he suddenly stripped at an exhibition of pictures and sculptures portraying nude men through the ages.

Vienna’s Leopold Museum says that after taking his clothes off, the man calmly sauntered through the exhibition, dressing again only after a security guard asked him to do so.

Museum spokesman Klaus Pokorny said Tuesday that the museum had nothing to do with Saturday’s strip, describing it as a “spontaneous act.” He says other visitors did not appear disturbed.

He said that since its Oct. 19 opening, the “Nude Men” exhibition had attracted more than 65,000 visitors — all of them dressed except for one.