Robert Indiana is an American artist known for using words and numbers in his artwork. Some of his most famous works include "LOVE" and "HOPE" sculptures and images. He was inspired by street signs, house numbers, and other everyday symbols. Indiana's artwork often conveys messages about love, hope, and the experiences along his travels. His iconic "LOVE" image was featured on the first "LOVE" stamp in 1973 and sculptures have been installed across the US and elsewhere.