Tim Cook recently mentioned that he wasn't sure when iPhone was invented as he recently spotted an Apple handset in a 350-year-old painting.

The Apple CEO mentioned that he had seen an iPhone in a 17th century Dutch painting on a trip around Amsterdam's Rijks Museum. Following that, when Cook was asked if he knew when the first iPhone was invented, Cook joked that he was not sure about it.

"You know, I thought I knew until last night, "Cook said in response to a question from Dutch former politician Neelie Kroes, according to Independent. "Last night Neelie took me over to look at some Rembrandt and in one of the paintings I was so shocked. There was an iPhone in one of the paintings."

During the event a picture of the painting was shown, which included a blurry object in the hand of a man. To which Cook said, "It's tough to see but I swear it's there."

The painting in question was a work of Pieter de Hooch, and is commonly known as "Man Handing a Letter to a Woman in the Entrance Hall of a House". This actually clears the doubt as to what the thing in man's hand was.

Meanwhile, work on the first iPhone was started back in 2004, when Apple assigned certain employees to work on "Project Purple", which was reportedly a tablet, rather than being a phone. The phone or the so called iPhone was revealed to the public in 2007, and went on sale later that year, making it a much craved item.