In the 20th century technology mixed with architecture in a very particular way. Roughly put we could say there were two trends, one Corbusian, with an architecture of the plastic and the formal, supported by a technology of concrete, the other programmatic and structural, overall Miesian, supported by a technology of steel. Now we can conclude steel has won the battle, simply because the technology of concrete was one of the monolithic which lacks the resilience of the composite.