David Adler was an all-around good guy. Not only was he a world-renowned architect who favored expansive, Old World architecture and designed numerous landmark buildings, but he also loved his mom. Or, at least that's what we gather from this remodeled and expanded 3,500-square-foot home and coach house he designed for her in Libertyville on a large, secluded lot. Like many of his residential projects, this five-bed, 2.5-bath home has earned a place on the National Register of Historic Places. And while respect is paid to the architect's original designs, there are modern finishes where it matters, such as the Bosch, Wolf and Sub-Zero appliances in the kitchen. Got $2.15M to spare, plus $110 in monthly HOA fees? If not, maybe mom can loan you the difference.