MADEMOISELLE O likes the World Expos because they are events of public interest, showing the progress of human beings to meet the needs of a civilization as well as future prospects. The World Expositions (or World Expos) were created to present the industrial achievements of the different nations. The organization of World Expositions gave birth to major urban projects such as the construction of the Paris metro in 1900 or that of Montreal in 1967.

In the same way, some architectural achievements built on the occasion of World Expositions became the symbol of the cities that sheltered them.

MADEMOISELLE O presents in its own personal way some of them, which have become historic.