 Complete the following phrase:  The nineteenth century led to a certain economic and cultural revitalization, which reflected in one of the most fruitful periods in the citys architecture, Modernisme. Until the nineteenth century, Barcelona was corseted by its walls of medieval origin, being considered a military place, so its growth was limited. The situation changed with the demolition of the walls and the donation to the city of the Parc de la Ciutadella, which led to the expansion of the city along the adjoining plain, a fact that was reflected in the Eixample project designed by Ildefonso Cerdá. This was the largest territorial expansion of Barcelona. Another significant increase in the area of the city was the annexation of several bordering municipalities between the late nineteenth and early twentieth centuries. All this meant the adaptation of the new urban spaces and an increase in municipal artistic commissions on public roads, which were also favored by various events held in the city such as the Universal Exhibition of 1888 and the 