Thessaloniki, or Salonica is the second-largest city in Greece and the capital of Macedonia, the nation's largest region. It is the largest city in the wider geographical region of Macedonia, and also one of the largest cities in southeastern Europe. The Thessaloniki Urban Area extends around the Thermaic Gulf for approximately 17 kilometers (11 mi) and comprises 16 municipalities. According to the 2001 census, the municipality of Thessaloniki had a population of 363,987, while the metropolitan population approximates one million inhabitants. Thessaloniki is Greece's second major economic, industrial, commercial and political centre, and a major transportation hub for the rest of southeastern Europe; its commercial port is also of great importance for Greece and its southeast European hinterland.
Thessaloniki is home to a number of festivals and events, including the Thessaloniki International Trade Fair, with its eighty-year history; the city's Fair has been hosted at the Thessaloniki International Exhibition Center and attracts over 300,000 visitors in 2007. The main football stadiums in the city are the state-owned Kaftanzoglio Stadium, Toumba Stadium and Kleanthis Vikelides Stadium home grounds of Iraklis, PAOK and Aris respectively. PAOK, Iraklis and Aris are founding members of the Greek league.