Blue mosaic-tiled columns inspired by an ancient Persian caravanserai wrap the Iran Pavilion at Expo 67 in this chrome postcard from Montréal's world's fair — a quick, affectionate note scrawled on the back ("It's great. I'll be back in three days.") capturing the fair's whirlwind energy from someone who was actually there.

• Publisher: Plastichrome of Canada / Benjamin News Co. Ltd., Montréal
• Postmark: Expo 67, Montréal, 1967
• Status: Posted