How would OMA’s Jussieu Library or Kazuo Shinohara’s Helsinki Art Museum react to today’s sustainability standards and requirements were their realization be finally given the go? The current climatic crisis demands that architects meet ever more strict environmental standards. Despite the urgency of this technological and conceptual shift, both built projects and competition entries that have surged to the status of canon are still examined and studied without heed to how they perform from a sustainability perspective. Following the assessment of built projects done in the fall semester 2022, the diploma course will now ask how key competition entries in the history of architecture would fare should they be put through the sustainability test and be built in our times.Upon selecting a project and examining its formal, constructive, technical, cultural, and historical features, each student will identify issues that would make it obsolete by today’s environmental standards. Following this assessment, the student will propose a makeover of the project in question (not only technical or constructive, but also programmatic, contextual, political…) to make it carbon neutral.By making (or not making) changes to the project, the students will develop a critique of both the competition design itself and of today's energetic standards. In so doing, the course examines the durability of architectural masterpieces whose unbuilt status allows a free and unconstrained imagination of their possible present.As such, the course aims to foreground the contingency of the current paradigm in durability and spur critical thinking about how we might pursue a sustainable future without renouncing to radical architectural ideas.