is based in the city. Chiesi Farmaceutici in the pharma industry is headquartered in Parma. The European Food Safety Authority is also based in Parma. Transport Parma railway station is on the Milan–Bologna railway system. The Parma trolleybus system has been in operation since 1953. It replaced an earlier tramway network, and presently comprises four trolleybus routes. Aeroporto Internazionale di Parma, Parma's airport, offers commercial flights to cities in a number of European countries. Twin towns – sister cities Parma is twinned with: Bourg-en-Bresse, France Ljubljana, Slovenia Shijiazhuang, China Szeged, Hungary Tours, France Worms, Germany Stockton, United States See also European College of Parma University of Parma References Bibliography External links Live-streaming webcam on Garibaldi Square Parma's view from satellite (Google Earth) 360° photos of City of Parma Video Introduction to Parma and the Parmigiano Reggiano Video Brief History of Parma The European Food Safety Authority Website Photo Gallery by Leonardo Bellotti Parma on The Campanile Project Cities and towns in Emilia-Romagna