The Universal Exposition of 1900 celebrated the turn of the century. It also took place at the Champ de Mars and attracted fifty million visitors. In addition to the Eiffel Tower, the Exposition featured the world's largest ferris wheel, the Grande Roue de Paris, one hundred metres high, carrying 1,600 passengers in 40 cars. Inside the exhibit hall, Rudolph Diesel demonstrated his new engine, and the first escalator was on display. The Exposition coincided with the 1900 Paris Olympics, the first time that the Olympic games were held outside of Greece. It also popularised a new artistic style, Art nouveau, to the world. Two architectural legacies of the Exposition, the Grand Palais and Petit Palais, are still in place.