The 1998 Lisbon World Exposition, also known as Expo 98, was a global exhibition held in Lisbon, Portugal, from May 22 to September 30. The theme of the exposition was "The Oceans, a Heritage for the Future," highlighting the importance of the world's oceans and promoting environmental awareness. The event featured pavilions from 143 countries, showcasing innovations and cultural exhibits. One of the most notable structures built for the exposition was the Gare do Oriente, a modern transportation hub designed by architect Santiago Calatrava. Expo 98 attracted millions of visitors and left a lasting impact on Lisbon's urban landscape.