Government buildings, once almost universally serious and sober looking, usually in variations of the school of neoclassical architecture, began to appear in more sculptural and even whimsical forms. One of the most dramatic examples was the London City Hall by Norman Foster (2002), the headquarters of the Greater London Authority. The unusual egg-like building design was intended to reduce the amount of exposed wall and to save energy, though the results have not entirely met expectations. One unusual feature is a helical stairway that spirals from the lobby up to the top of the building.