TEHRAN — The mayor of Tehran, Mohammad Baqer Ghalibaf, is well known in Iran as a former Revolutionary Guards commander, retired pilot and the loser of two presidential elections. This week he added one more title — patron of the arts — as he directed all of the city’s 1,500 billboards fitted out with copies of famous works of art, including many by prominent Western artists.

Almost overnight nearly all of Tehran’s billboards, which are owned by the city and are a prime source of income, stopped showcasing South Korean dishwashers and the latest bank interest rates (now 22 percent) and sported still lifes by Rembrandt and images by the French photographer Henri Cartier-Bresson.

Residents of Tehran, who spend hours a day on congested roads, often protecting their mouths from the continuous blanket of smog, rubbed their eyes at the sight of works by such artists as Rothko (Nos. 3, 10 and 13) and Munch (“The Scream,” of course), along with pieces by prominent Iranian artists.