city, eastern Entre Ríos provincia (province), northeastern Argentina. It lies on the Uruguay River south of Paysandú, Uru. Founded in 1783, it was the site of an uprising in 1870 and is now a major commercial and industrial centre but retains its many historical sites and monuments. Products from the surrounding region are processed to yield frozen meat, dairy foods, cider, yerba maté (Paraguayan tea), and flour. The city also has sawmills and quarries. Trade with Uruguay is important, mostly in grains and beef. The port can accommodate oceangoing vessels, and the city is linked to Buenos Aires, 150 miles (240 km) south, by highway, railroad, hydrofoil, and steamer. The revised Argentine constitution of 1994 was signed in Concepción del Uruguay. Pop. (2001) 64,954.