Schwarz previously worked with the academies as part of an Artist in Residency in the Heritage Lab of the Amsterdam Creative Industries Network. In this, students and staff considered the repurposing of heritage from a new cultural perspective on interfaces between heritage and space, from sustainism. The lexicon is a reflection on this program. It explores what a socially sustainable view of our living environment means for both design and the heritage domain. In this "dictionary for the new era," Schwarz outlines a changing culture in seven entries : Placemaking, Connectedness, Local, Commons, Circularity, Proportionality, Co-Design. Professor of Cultural Heritage Riemer Knoop placed a field observation with each key concept. Designer Joost Elffers, with whom Schwarz introduced the concept of sustainism in 2010, translated the key words into seven visual-graphic symbols.