This document discusses the principles of organic architecture and two influential architects from the 1950s: Frank Lloyd Wright and Alvar Aalto. It describes Wright as developing an organic style influenced by Japanese architecture and Maya temples, including his Prairie Style homes featuring integrated indoor and outdoor spaces. His most famous works include Fallingwater and the Guggenheim Museum, integrating architecture with nature using materials like stone and glass. The document also summarizes Aalto's work as rationalist but also incorporating local materials like wood, and focusing on designs appropriate for human use and experience.