between c. 1780 and 1830, and particularly from 1785 to 1815. This style shares its name with its era, the Federal Period. The term is also used in association with furniture design in the United States of the same time period. The style broadly corresponds to the middle-class classicism of Biedermeier style in the German-speaking lands, Regency style in Britain and to the French Empire style. In Central and Eastern Europe, the style is usually referred to as Classicism (, ), while the newer Revival styles of the 19th century until today are called neoclassical. Étienne-Louis Boullée (1728–1799) was a visionary architect of the period. His utopian projects, never built, included a monument to Isaac Newton (1784) in the form of an immense dome, with an oculus allowing the light to enter, giving the impression of a sky full of stars. His project for an enlargement of the Royal Library (1785) was even more dramatic, with a gigantic arch sheltering the collection of books. While none of his projects were ever built, the images were widely published and inspired architects of the period to look outside the traditional forms. Similarly with the Renaissance and Baroque periods, during the Neoclassical one urban theories of how a good city should be appeared too. Enlightenment writers of the 18th century decried the problems of Paris at that time, the biggest one being the big number of narrow medieval streets crowded with modest houses. Voltaire openly criticized the failure of the French Royal administration to initiate public works, improve the quality of life in towns, and stimulate the economy. 'It is time for those who rule the most opulent capital in Europe to make it the most comfortable and the most magnificent of cities. There must be public markets, fountains which actually provide water and regular pavements. The narrow and infected streets must be widened, monuments that cannot be seen must be revealed and new ones built for all to see', Voltaire insisted in a polemical essay on 'The Embellishments of Paris' in 1749. In the same year, La Font de Saint-Yenne, criticized how Louis XIV's great east façade of the Louvre, was all but hidden from views by a dense quarter of modest houses. Voltaire also said that in order to transform Paris into a city that could rival ancient Rome, it was necessary to demolish more than it was to built. 'Our