Leo Burnett (Dubai) did a campaign for McDonald's celebrating 46 years of the Big Mac in 2012. It was titled Big Mac. Big Every Year Since 1967. An iconic event was singled out for each of these 46 years, and an artist was commissioned to depict each event. I chose 1997, the year Harry Potter and the Philosopher's Stone was published.
Each element was drawn separately, scanned, and finally coloured in Photoshop.