 The residence of the White House in the United States is such an example, but somewhat confusing.At the north portico, it contains a tiny vestibule now between the doors flushed with the outer and inner faces of the exterior wall of, and in the past inside, the "Entrance Hall" (called incorrectly "Vestibule") separated from the not much bigger "Cross Hall" by just 2 double columns.The difference in sizes between a vestibule and the following space is better illustrated by the—so called—"entrance" (15) to the main gallery in the Solomon R. Guggenheim Museum by Frank Lloyd Wright.