Peek through the doorway in the richly decorated living room to see the rotunda's stately columns.

The couple considers the home a work in progress: A 150-foot wading pool will soon serve as the focal point from the loggia and a new guest wing is beginning to climb the side of the house. "This is our dream house, and for us the dream doesn't end," says Lang. "It will constantly be creating itself. And, for us, thinking there is more to come is part of it."