FRACTAL ISTANBUL CENTRO MUNDI - NORTH Citywatcher Tarık Tolunay has been producing Istanbul-oriented city maps under the name Fractal Istanbul for 10 years. CENTRO MUNDI is the product of 9 months of day and night work. It is a 10 billion pixel sized mega work. It is a work that covers the last period of Istanbul, one of the cult cities of the world with its thousands of years of history, and contains hundreds of details.