A new chapter is added in the evolution of cities that emerges from the historical fabric of the built environment. The idea is to add architectural enzymes, or “mobile modules of natural growth”, all over the city. As such, the old forms, and traces of the past, become part of a new ecosystem. The huge amount of available surface area within empty office buildings, ex-industry zones, and other stagnated areas serve as a potential breeding ground for the natural environment. The fusion of land and cityscape introduces recreational and natural qualities into the daily routines of its inhabitants. Through this combination, the past of both the natural and architectural is updated and preserved.