American, b. 1938. Richard Serra is best known for his sculpture, the controversial, "Tilted Arc", which was installed in downtown Manhattan in 1981. He pioneered the art of creating monumental sculptures that modified and emphasized perceptions of space and proportion, often making viewers experience dizziness or a skewed orientation as they walk around them. Serra’s sculptures worked with the movement of people in relation to space and centralizing that space in different ways was the key to creating engaging pieces of art. His works employ unconventional materials like vulcanized rubber and molten lead as seen in his work, "Splash" (1968-1970).