Read this: In 1868, the horse-drawn tram company Compania de Tranvias al Paso del Molino y Cerro created the first lines connecting Montevideo with Union, the beach resort of Capurro and the industrialized and economically independent Villa del Cerro, at the time called Cosmopolis. In the same year, the Mercado del Puerto was inaugurated. In 1869, the first railway line of the company Ferrocarril Central del Uruguay was inaugurated connecting Bella Vista with the town of Las Piedras. During the same year and the next, the neighbourhoods Colon, Nuevo Paris and La Comercial were founded. The famous to our days Sunday market of Tristan Narvaja Street was established in Cordon in 1870. Public water supply was established in 1871. In 1878, Bulevar Circunvalacion was constructed, a boulevard starting from Punta Carretas, going up to the north end of the city and then turning west to end at the beach of Capurro. It was renamed to Artigas Boulevard (its current name) in 1885. By Decree, on 8 January 1881, the area Los Pocitos was incorporated to the Novisima Ciudad (Most New City).
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): What year was Bulevar Circunvalcion constructed?
1878