The oldest-surviving blueprint from medieval times details the layout and construction of a village and monastery called the Plan of St. Gall. Archaeologists and craftspeople are building that community, first described in 800 A.D., using only the tools and methods available back then. Author Kristen Ghodsee describes what we can learn from a medieval idea of utopia in this conversation with The World’s Marco Werman. (Originally aired Aug. 10, 2023.)