As a case study, we examine Hungary’s legal pathways of sustainability, both in theory and practice, across a number of the visible fields of law: constitutional, economic, environmental and international. Firstly, the chapter identifies some general pronouncements and key findings to provide context and mapping to the second part of the case study. Afterwards, the second part critically assesses the interpretation and incorporation of sustainability into the Hungarian legal system, using textual analysis (text mining) and frequency graphics based on the legal documents.