Expo '98 (1998 Lisbon World Exposition) was an official specialised World's Fair held in Lisbon, Portugal from Friday, 22 May to Wednesday, 30 September 1998.[1] The theme of the fair was "The Oceans, a Heritage for the Future", chosen in part to commemorate 500 years of Portuguese discoveries. The Expo received around 11 million visitors[2] in 132 days, while 155 countries and organizations were represented.