"The key design concept came to be called retrofitting, the idea being that once cities start to seriously break down, no one would bother to start new construction from scratch. Rather, such essentials as electrical and ventilation systems would simply be added onto the exteriors of older buildings, giving them a clunky, somehow menacing look. Progress and decay would exist hand in hand, and the city’s major buildings, like the massive, Mayan-inspired pyramid that houses the Tyrell Corp., would tower miles above the squalor below."