The Delaware Historical Marker Program began in 1931 when the General Assembly of Delaware passed an act establishing a permanent commission to erect historical markers throughout the state. The markers in each county were numbered sequentially as they were proposed, preceded by NC (New Castle), K (Kent), and S (Sussex) to note the county in which they were located. Since the beginning of the program in the 1930s, the State of Delaware has erected more than 660 markers. The Delaware Public Archives has administered the Historical Markers Program since 1990.