“Built for the 1898 World's Fair, the Eiffel Tower is a steel creation by Gustave Eiffel. It still stands today as a monument to man's abilities, and for almost 50 years was the tallest man-made structure in the world.”
A total of 18,038 individual pieces of cast iron were used to build the Eiffel Tower. Elements were bolted together in roughly 5-foot lengths at Eiffel's fabrication shop and then transported to the site. There, the bolts were removed and the segments permanently riveted together, using a total of 2,500,000 rivets.ment Two
From : http://c-anderson0912-cts.blogspot.com/2010/03/modernity-and-modernism-lecture-notes.html
The main symbol of the Fair was the Eiffel Tower, which was completed in 1889, and served as the entrance arch to the Fair. The tower was constructed of puddled iron, a form of purified wrought ironand was designed by Gustave Eiffel. The 1889 fair was built on the Champ de Marsin Paris, which had been the site of the earlier Paris Universal Exhibition of 1867, and would be the site of the 1900 exposition as well.