For decades Frederick Law Olmsted (1822–1903) designed parks and park systems across the United States, leaving an enduring legacy of designed public space that is enjoyed, studied, and protected today. His plans and professional correspondence offer a rich source for understanding his remarkable contribution to the quality of urban life in this country and the development of the profession of landscape architecture. Olmsted's writings also provide a unique record of society and politics in post–Civil War America. Historians, landscape architects, conservationists, city planners, students, and citizens' groups continue to turn to Olmsted for ideas about the development and conservation of green spaces in urban areas.