Architecture traditionally has been the slowest of art forms. It was not unusual for great cathedrals to take centuries to complete, with stylistic changes from Romanesque to Gothic or Renaissance to Baroque as common as the addition of chapels or spires. But because the function remained the same, the form could be flexible and its growth organic.

Despite the persistent image of the architect as a heroic loner erecting monumental edifices through sheer force of will, the building art has always been a highly cooperative enterprise.

A turning point in the public's perception of the building art came with the publication of Frank Lloyd Wright's 'An Autobiography' of 1932, a picaresque narrative that captivated many who hadn't the slightest inkling of what architects actually did.

One of the Age of Enlightenment's most hypnotic images is Ledoux's rendering of his neoclassical theater of 1775 - 1784 in Besancon, surreally reflected in the colossal eye of an unidentified cosmic being.

All architecture, classical or not, must have some sense of order, and order is much harder to achieve without the straight lines and right angles that have dominated the building art from time immemorial.

Experimental architecture by its very nature is more prone to the depredations of time and natural elements than buildings made from conventional materials through traditional methods. Avant-garde architects often simply do not know how the products of their imagination will perform when implemented, especially if untested components are involved.

Although prefabrication has a long history - the ancient Romans shipped pre-cut stone columns, pediments, and other architectural elements to their colonies in North Africa, where the numbered parts were reassembled into temples - the idea took on a new impetus with the technological advances of the Industrial Revolution.