Related to the notable economic development that was seen in Portugal from the 1960s to the early 21st century (with an abrupt but short-lived halt after 1974), the development of tourism, which allowed increased exposure for national cultural heritage, particularly in regards to architecture and local cuisine, improved further. The adoption of the euro and the organization of Expo 98 World Fair in Lisbon, the 2001 European Culture Capital in Porto, and the Euro 2004 football championship, were also important landmarks in the economic history of the country.