He did not form any close friendships, even though Sullivan himself took a liking to him. Sullivan engaged him in a five-year contract. The contract would later become a subject of contention, for it stated that Wright could not participate in outside work. When Sullivan discovered that Wright was taking on extra commissions, he ordered him to stop. The relationship came to an end. Wright left Sullivan and began to work on his own. He founded his own practice at just 25 years of age and with design after design he never looked back. His Unitarian faith -- and the philosophy he had learned from Sullivan -- helped inform each of his designs.

With some new associates, Wright formed the Prairie School -- a distinctly American style of architecture. Wright himself worked on the Winslow House, which emphasized line and horizontal elements and all of Wright's designs emphasized the use...
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