Did Harry Truman create the House of administration?

No, Harry Truman did not create the House of Administration. The term typically refers to the executive branch of the U.S. government, which has existed since the founding of the country. Truman served as the 33rd President of the United States from 1945 to 1953 and focused on various policies and reforms, but he did not establish a new governmental body called the House of Administration.