IRISH STONE WALLS

The Irish countryside is a patchwork of over 250,000 miles (400,000 kilometers) of stone wall. Built from local stone according to the style of each region, these walls are an intrinsic part of the landscape. Patrick McAfee, master stonemason and conservation expert, reveals the history of this ancient tradition and gives illustrated examples of the care and restoration of stone walls of all types.

SULLIVAN'S HOUSES

Though perhaps best known for his public buildings in late 19th century Chicago, Louis Sullivan was also a superb residential architect, master of the style later developed further by Frank Lloyd Wright. Next week we take a closer look at some of Sullivan's houses, as described in a new book, "Sullivan's City: The meaning of Ornament for Louis Sullivan," by David Van Zanten and photographed by Cervin Robinson.

MANUFACTURING FREE-FORM ARCHITECTURE

The Computer-Aided Design and Manufacturing (CAD/CAM) Laboratory at the Harvard Graduate School of Design is perhaps the most extensive facility of its kind in an architecture school. Research into the design and manufacture of freeform architectural components and surface structures has been conducted for several years, including the creation of prototypes and tooling for structures made of reinforced concrete, metal, wood and advanced composites. We'll explain how the new CAD/CAM paradigm can be used to create freeform metal frame components for buildings.