“Cinematographic posters are like popular songs,” the filmmaker Federico Fellini said. “They take you back not only to the film but to their seasons, the atmosphere, and the taste of an era.”

No one understands this concept better than Tony Nourmand. Growing up in Tehran in the 1960s, he went to the cinema once a week with his dad or uncle. While the credits rolled, and the adults went to another room to sip tea, Nourmand would hang back and flick through the movie-poster pile. He developed a ritual: every week he carried one home and stuck it on the wall, replacing the one from the week before.