Tracing the life of architect Hans Heyerdahl Hallen (1930–2022), this book reveals the transnational influences that shaped his practice in South Africa, and the migratory circles of ideas that defined a new form of subtropical architecture.Beginning with Hallen's Nordic and South African roots, chapters then explore his practice and studies at the London County Council and Architectural Association, where he met with contemporaries such as Jane Drew and Maxwell Fr...