Hartford Castle is the ruins of a 19th-century residence located near Hartford, Illinois, United States. It is located at (38.800600, -90.084600) approximately north of downtown St. Louis, Missouri. The official name of the home was Lakeview. It was constructed by John J. Biszantz, a real estate developer from St. Louis. Born and raised in Ohio, Biszantz built the estate in 1897 after his wife Lillie, who was also from St. Louis, died in 1890.