Blackwell Island Lighthouse, which is also known as Welfare Island Lighthouse and Roosevelt Island Lighthouse is a stone lighthouse built by New York City in 1872.[4][5][6] It is at the northeast tip of Roosevelt Island in the East River in Lighthouse Park. It was named to the National Register of Historic Places on March 16, 1972[2] and was designated a New York City Landmark on March 23, 1976.[5]