The design of the new Town Center Sofia is based both on 21st century building technology and aesthetics, as well as influences from Old Bulgarian architecture. The layout of the existing structures resembles the traditional layout of a monastery complex, though at a different scale and with a different function. With deep affection of the timeless beauty of Bulgarian Renaissance architecture, paastudio presents a new way of turning an outdated industrial facility into one of the focal points in the capital city. The factory buildings present a challenge in themselves, being visibly uneven in plumb and level of the existing structural elements to remain. With the intent to be within the required construction budget, we proposed a new total building envelope. It consists of three different types of exterior façade panels, as well as hip roofs and penthouse enclosures. They allow for implementing of basic passive green principles and converting the buildings to higher energy efficiency. The panels are also reflecting the Old Bulgarian building tradition of enclosing house porticoes with intricate wood louvers. The envelope idea is carried in the interior as well – floors are raised by ±20 centimeters to accommodate unevenness of substructure and allow installation chutes, along with furring walls.