Behind a cast iron facade in New York's Flatiron district, a young and dynamic tech company embraces the history of its new headquarters space. The budget-conscious fit-out celebrates the building's turn-of-the-century architectural detailing and vestiges of some well-known former tenants: rapper, 50 cent and fashion designer, Mark Ecko.

Ultimately, however, the simple yet bold design of the AppNexus Headquarters reflects and supports the creativity and vitality of this internet company's forward-looking culture.