The original airport that served Manila, Grace Park Airfield (also known as Manila North) in Grace Park, Caloocan (then a municipality of Rizal), was opened in 1935. It was the city's first commercial airport and was used by the Philippine Aerial Taxi Company (later Philippine Airlines) for its first domestic routes. In July 1937, Nielson Airport, located on a 45-hectare (4,800,000 sq ft) plot of land in Makati, also then in Rizal, was inaugurated and served as the gateway to Manila; its runways now form Ayala Avenue and Paseo de Roxas.