In 1852, Louis Napolean III wanted to rebuild the city of Paris and appointed Baron Haussmann, the Chief architect as the perfect of the seine. His name has come to stand for the forcible reconstruction of cities to enhance their beauty and impose order.
The poor were evicted from the centre of Paris. For 17 years after 1852, Haussmann rebuilt Paris. Straight broad avenues of boulevards and open spaces were designed and full grown trees were transplanted. By 1870, one-fifth of the streets of Paris were Haussmann's creation. Bus shelters and tap water were introduced.
The whole process is referred to as Haussmanisation of Paris.