For which world's fair was the Eiffel Tower built?

The Eiffel Tower was built for the 1889 World's Fair, officially called the Exposition Universelle of 1889. It also marked the centennial of the French Revolution, giving Paris a chance to showcase French engineering and industrial achievement.

Gustave Eiffel's company constructed the tower between 1887 and 1889 on the Champ de Mars. At 300 metres, it was the world's tallest human-made structure when the exposition opened. The tower was initially controversial, with prominent artists and writers criticizing its appearance, but visitors quickly made it a sensational success.

A common mix-up is the 1900 World's Fair, also held in Paris. The Eiffel Tower stood during that exposition, but it was not built for it. The tower was specifically designed as the centerpiece of the 1889 event and was nearly dismantled after its original concession expired before its usefulness for radio helped secure its survival.