Venustiano Carranza is one of the 16 boroughs of Mexico City. The borough was formed in 1970 when the center of Mexico City was subdivided into four boroughs. Venustiano Carranza extends from the far eastern portion of the historic center of Mexico City eastward to the and the border dividing the then Federal District from the State of Mexico. Historically, most of the territory was under Lake Texcoco, but over the colonial period into the 20th century, the lake dried up and today the area is completely urbanized. The borough is home to three of Mexico City's major traditional markets, including La Merced, the National Archives of Mexico, the Palacio Legislativo de San Lázaro, the TAPO intercity bus terminal and the Mexico City Airport.