Some of the world’s most beautiful and innovative works of contemporary architecture owe their unique character to one of the world’s most common building materials—concrete.

From June 19, 2004, to January 23, 2005, in a major exhibition titled Liquid Stone: New Architecture in Concrete, the National Building Museum in Washington, D.C., will recognize the contributions concrete has made to architecture since the time of the Romans and will look ahead to material developments that will push concrete to new levels.