What’s America’s best building? Robert Campbell suggests that Frank Lloyd Wright’s Taliesin ought to be considered. But it’s in bad repair. “Wright is arguably the greatest American artist in any field of the visual arts, and Taliesin is perhaps his masterpiece. If we don’t save it, we have no claim to call ourselves a culture. The cost of restoration has been estimated at $60 million. The Big Dig is costing 250 times that.”