The O-14 Office building in Dubai is a 22 stories tall, the 300,000 square-foot commercial tower. The façade is comprised of 16″ thick concrete containing over 1,000 circular openings. Designed by RUR Architecture, the building’s ground was broken in December of 2006 and is classified as a green building.

From Archinet:

The shell is not only the structure of the building, it acts as a sunscreen open to light, air, and views. The openings on the shell modulate depending on structural requirements, views, sun exposure, and luminosity. A space nearly one meter deep between the shell and the main enclosure creates a so-called “chimney effect,” a phenomenon whereby hot air has room to rise and effectively cools the surface of the glass windows behind the perforated shell. This passive solar technique essentially contributes to a natural component to the cooling system for O-14, thus reducing energy consumption and costs, just one of many innovative aspects of the building’s design.

via archinet via inhabitat