Polish photographer Peter Kowalski explores how the city of Rome has changed over the decades, having grown into an incredibly busy and complex urban environment.
Each image from his Untitled 2013 project consists of three to five photographs taken at different times to represent various architectural periods. Overlaid on top of each other, the frenzied scenes reflect the chaos of the city in a myriad of abstracted shapes and colours. Buildings are blurred and details become indistinct, yet the overall optical effect is mesmerising.
Read our Layered Colour report for more about multi-layered imagery and colour effects.