An old airfield for Kazan's major airport (situated outside of city limits) was likely built during the World War II era. The airport was located 8 km northeast of the city centre, and has since been replaced by civilian construction, such as the residential development 'Kazan - 21st Century', Azure Skies (one of the tallest buildings in Kazan) and the largest international hippodrome in Russia. Although the airport is gone, the surrounding neighborhood still carries the name 'Old Airport' (tat. İske Aeroport, rus. Старый Аэропорт).