At a former military site in Sofia, Bulgaria, a new extension was designed for the Belgian company Melexis nv. The main challenge lay in the processing of the ambitious program within the existing context, taking into account various and very different preconditions. During the design, the program was also adjusted to a large extent in order to be able to respond to the increased growth prognoses. The building shows itself as a compact but extensive monolith. Within this volume, the various functions are once again stacked: a strictly conditioned production space, a highly inspiring office environment, a visitor center and a connecting plaza, where people gather, eat, rest, read, work. This plaza is directly connected to the garden and has a beautiful view of the nearby mountain peaks of Vitosha.