Gustave Eiffel the city of Dijon, Côte-d'Or, the first child of Catherine-Mélanie (née Moneuse) and Alexandre Bönickhausen (). He was a descendant of Jean-René Bönickhausen, who had emigrated from the German town of Marmagen and settled in Paris at the beginning of the 18th century. The family adopted the name Eiffel as a reference to the Eifel mountains in the region from which they had come. Although the family always used the name Eiffel, Gustave's name was registered at birth as Bonickhausen dit Eiffel, and was not officially changed to Eiffel until 1880. At the time of Gustave's birth his father, an
Philadelphia City Hall 1871 to 1901 at a cost of $24 million. City Hall's tower was completed by 1894, although the interior wasn't finished until 1901. Designed to be the world's tallest building, it was surpassed during construction by the Washington Monument and the Eiffel Tower. Upon completion of its tower in 1894, it became the world's tallest habitable building. It was also the first secular building to have this distinction, as all previous world's tallest buildings were religious structures, including European cathedrals and—for the previous 3,800 years—the Great Pyramid of Giza. With almost 700 rooms, City Hall is the largest municipal building