Step 1 : Introduction to the question "Which famous U.S. landmark was officially completed in 1941 after decades of construction?"
...Construction of Mount Rushmore began in 1927 and was officially completed in 1941, though the original grand design was never fully finished due to funding shortages and the onset of World War II. Sculptor Gutzon Borglum designed the massive monument featuring the faces of four U.S. presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln. Carved into the granite cliffs of South Dakota’s Black Hills, the landmark has become one of the most recognizable national monuments in the United States.0
