The book is an intellectual biography of Leonardo Ricci in the United States which fulfills the historiographical lacuna on his American transfer between 1952 and 1972.Often told as a constant exchange with the United States, it accompanied him until the 1980s and influenced his teaching and professional work. The book retraces philologically the stages of Ricci’s experience overseas unveiling the premise and results of his American transfer from Italy towards the United States and viceversa. To focus on the mentioned period, considered by Ricci himself a fundamental phase for his architectural and painting research, it defines to what extent each stage produced an evolution in his theoretical and applied research, systematized with the architect’s view on teaching reform aims and the synopia of the City of the Earth.