“The Persians called this square, Naqsh-e Jahan Square, half the world, meaning to see it was to see half the world,” Samira Ahmed explains. The joy of seeing the grand square laid out in front of her speaks stories on her face, a broad grin gradually emerging. She is in Esfahan to tell the fascinating tales of this grand monument for BBC Four’s Art of Persia – an exquisite series looking at the history and culture of the alluring land of Iran, once known as Persia. I may be sat in my London flat right now in a looming lockdown, but I once saw half the world.