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The history of Peoria, Illinois, began when lands that eventually would become Peoria were first settled in 1680, when French explorers René-Robert Cavelier, Sieur de La Salle, and Henri de Tonti constructed Fort Crevecoeur. This fort later burned to the ground, and in 1813 Fort Clark was built. When the County of Peoria was organized in 1825, Fort Clark was officially named Peoria.