Four Pillars: what they are, what they mean, and what we did towards each. 1. Economic Viability: the creation of a landmark development that could achieve proper financing while also supporting the remaining pillars of the development. 10 World Trade’s remarkable architecture flips a typical building model on its head, literally. The floor sizes increase as the building gets taller, so public space is maximized at the ground levels while the top floors – which have the best views in town – are the largest and most usable. 2. Sustainability: demonstrating an environmentally conscious approach to design, construction, and management of the development project. 10