Structure: Liesje Ketchel ResidenceLocation: Oak Ridge, TennesseeArchitect: Liesje KetchelDate: 1970Tidbit: In 1970, Dr. Melvin Ketchel (a biologist with a PhD from Harvard) was hired to head up the Oak Ridge Population Research Institute. His wife, Liesje Ketchel, had a BA in psychology and an MArch from Harvard. So, while Dr.