Detail of a project for President Roosevelt’s eastward addition to the east wing, office of Lorenzo Winslow, 1943. At the request of President Franklin D. Roosevelt, Lorenzo Winslow, a government architect assigned to the White House, prepared designs and supervised construction in 1942 of a new east wing. Jefferson and Latrobe’s original east wing was torn down in 1866 because of its poor condition. In 1902 McKim constructed a new glass-enclosed wing on its foundations and created an entrance for social functions with a port cochere for guests and carriages. There were no changes to the wing for 40 years. The new east wing contained a formal entrance for guests, offices on the first and second floors, and an air raid shelter underground.