Milan Linate Airport (IATA: LIN, ICAO: LIML) is the third international airport of Milan, the second-largest city and first urban area of Italy, behind Malpensa Airport and Orio al Serio Airport. It served 9,233,475 passengers in 2018, being the fifth busiest airport in Italy, and is used as a base by Alitalia and Alitalia CityLiner. The airport was built next to Idroscalo of Milan in the 1930s when Taliedo Airport (located 1 km (0.62 mi) from the southern border of Milan), and one of the world's first aerodromes and airports, became too small for commercial traffic. Linate was completely rebuilt in the 1950s and again in the 1980s. Since 2001, because of Linate's close proximity to the centre of Milan – only 7 km east of the city centre, compared with Malpensa, which is 41 km northwest of the city centre – its capacity has been reduced by law from 32 slots per hour (technical capacity) down to 22 slots per hour (politically decided capacity) and only domestic or international flights within the EU have been allowed. That year, 2001, also saw a major accident at Linate with many illegal and non-ICAO-regulation practices and layouts part of its then operation.