© 2019, © 2019 The Australian National University. This article explores and decodes the social experiences of the ruins of St. Paul’s in Macau. The depictions of St. Paul’s as a disruptive social space are elucidated by the concepts of heterotopia, palimpsest and liminality. As a palimpsest, Macau’s ruins comprise a variety of concealed and superimposed semantic layers. One can read the ruins and decipher these semantic tiers. The reading of buildings as palimpsests recognises the paradoxical combination of their durable and transitory nature. St. Paul’s ruins encompass several stratified discourses such as cultural, historical, aesthetic. All of them are deciphered in their multivalent configurations, revealing their overarching heterotopic quality. This article aims to display St. Paul’s ruins as a culturally meaningful urban space of otherness within the ambivalent spatial realm of Macau while unfolding its disruptive nature.