This lecture explores the later and mature works of Frank Lloyd Wright, highlighting how his idea of organic architecture evolved into more expressive and innovative forms. It discusses his principles for domestic design, where he emphasized open planning, human scale, integration with nature, and reducing unnecessary enclosed spaces. Through projects like the Johnson Wax Building, the lecture explains Wright’s structural experimentation with mushroom columns, open workspaces, and the creative use of natural light. The lecture also examines the Marin County Civic Center and the Guggenheim Museum in New York, showing how Wright moved toward curved forms and continuous spatial experiences. The Guggenheim, with its spiral ramp and central skylight, represents his vision of fluid movement through space. Overall, the lecture demonstrates how Wright’s later works combined structure, form, and space into unified architectural expressions that influenced modern civic and museum architecture worldwide.