Town scapes changed little during the first half of the 19th century in Mexico, until the French occupation during the Second Mexican Empire in the 1860s. Emperor Maximilian I brought a new set of urban design ideas to Mexico. Drawing from the mid-century Parisian revelopment plan of Baron Haussmann, Maximillain administered the building of a broad new diagonal avenue- Paseo de la Reforma. This elegant boulevard ran for miles from the downtown National Palace to the lush Chapultepec Park where the Austrian ruler lived in the Chapultepec Castle. Along the Reforma, double rows of eucalyptus trees were planted, gas lamps installed, and the first mule-drawn streetcars were introduced. The development was the catalyst for a new phase of growth from downtown Mexico City to the west, a direction that would define the city's structure for the next half century.