When did Korczak Ziolkowski start working on the Crazy Horse Memorial?

Korczak Ziolkowski began working on the Crazy Horse Memorial in 1948 after being invited by Lakota Chief Henry Standing Bear. He dedicated his life to the project, which aims to honor Native American culture and heritage, and continued to work on it until his death in 1982. The memorial remains unfinished, with ongoing efforts to complete it.