Melvyn Bragg and guests discuss how the people of Cusco, in modern Peru, established an empire along the Andes down to the Pacific under their supreme leader Pachacuti. Before him, their control grew slowly from C13th and was at its peak after him when Pizarro arrived with his Conquistadors and captured their empire for Spain in 1533. The image, above, is of Machu Picchu which was built for emperor Pachacuti as an estate in C15th. With Frank Meddens Visiting Scholar at the University of Reading Helen Cowie Senior Lecturer in History at the University of York And Bill Sillar Senior Lecturer at the Institute of Archaeology at University College London Producer: Simon Tillotson