Olmstead’s 1874 landscape design plan for the United States Capitol, was a 15-year installation project.Olmstead on his life and work: The most interesting general fact of my life seems to me to be that it was not as a gardener, a florist, a botanist, or one in any way specially interested in plants and flowers, or specially susceptible to their beauty, that I was drawn to my work. The root of all my work has been an early respect for and enjoyment of scenery, and extraordinary opportunities for cultivating susceptibility to its power. I mean not so much grand or sensational scenery as scenery of a more domestic order — scenery which is to be looked upon contemplatively and is producing of musing moods. 

Olmstead’s 1874 landscape design plan for the United States Capitol, was a 15-year installation project.
Olmstead on his life and work: 
The most interesting general fact of my life seems to me to be that it was not as a gardener, a florist, a botanist, or one in any way specially interested in plants and flowers, or specially susceptible to their beauty, that I was drawn to my work. The root of all my work has been an early respect for and enjoyment of scenery, and extraordinary opportunities for cultivating susceptibility to its power. I mean not so much grand or sensational scenery as scenery of a more domestic order — scenery which is to be looked upon contemplatively and is producing of musing moods.