Thresholds are anthropological constants: they can be found in every
culture and every era. Like limits and borders, they express one of
humanity's fundamental relations to space. Places where spaces are
separated and connected, thresholds are also metaphorically potent
across cultures, as passageways where subjectivity is transformed.

A History of Thresholds: Life, Death and Rebirth
uses the threshold as a guiding thread to explore the meaning and
importance that humans have invested in built spaces. The book is a
visual narrative about the life, death and--eventually-- rebirth of these
thresholds: from the Ancient Greeks to the emergence of the private
domain and the transparency of contemporary architecture, which seems to
diminish the liminal space of the threshold. A History of Thresholds argues for the need to reinvent the threshold in order to establish a new contract between architecture and humanism.