Founded in 1873, Texarkana is a unique city in that it lies on the borders of Texas and Arkansas. The city is located in extreme northeast Texas, southwest Arkansas, and north of the Louisiana border. The Texas side of Texarkana has a population of about 35,000 and the Arkanasas side of Texarkana has a population of about 30,000. Certain buildings such as the Federal Building actually straddle the state line and it is often times defined in the architecture. Spanish explorers came to the area as early as 1542.