of the future Hôtel-Dieu. Even further from the city were large country estates whose farms were owned by the Montreal bourgeoisie. In 1850, a reservoir was installed in what is today the location of Saint-Louis Square. Its function was to supply water to Côte-à-Baron residents, who lived on the downward slope below Sherbrooke Street. At that time, a farm on the site of the current La Fontaine Park was converted into grounds for military exercises. To the north, other cities were formed following new economic activity, giving rise to the village of Coteau-Saint-Louis in 1846. A chapel was built two years later, then replaced in 1857 by the Church of Saint-Enfant-Jésus du Mile-End. Nowadays, the Mile End is a neighbourhood adjacent to the Plateau-Mont-Royal borough, but it was only in 1878 that the village of Saint-Louis-du-Mile-End was born. By the end of the century, the mountain was purchased by the City of Montreal and developed into Mount-Royal Park. La Fontaine Park took the place of the military field and the reservoir Côte-à-Baron became the Saint-Louis Square. The village of Saint-Jean-Baptiste took shape circa 1861. Its central point was also the location of its market (the first market was built in 1870 and replaced by a more modern market in 1933, which was demolished in 1966). The civic centre was located at the intersection of Saint Lawrence Street (later Saint Laurent Boulevard) and Rachel Street. The villages of Coteau-Saint-Louis and Saint-Jean-Baptiste merged into Montreal in 1893 and 1886 respectively. As for Saint-Louis-du-Mile-End and DeLorimier, they would be annexed to Montreal in 1910 and 1909 respectively. At that time, the population of Montreal spilled over east of Papineau Road (today Papineau Avenue), where elegant houses and avenues were located. In the early twentieth century, it was a working class neighbourhood. Over the years, spurred by economic growth, the working class population gradually deserted the area. By 1900, Coteau-Saint-Louis had become very cosmopolitan, and included several Protestant churches and synagogues. Several Protestant traders opened shop on St. Lawrence Street (renamed St. Lawrence Boulevard in 1905). St. Lawrence was the linguistic border between the French-speaking east, and English-speaking west. At that time, Saint Joseph Boulevard became the first tree-lined street in the city. In the 1930s, the Great Depression slowed construction in the district, although some work resulted in the funding for the landscaping of Sir Wilfrid Laurier Park. The Université de Montréal moved