This document defines the Metroglobal–FACTIS Reference Architecture as a non-normative, non-prescriptive structural framework for analysing societal transformation. The architecture establishes explicit conditions for epistemic validity, facthood, responsibility, and long-term viability across complex human–environment systems. It integrates the Metroglobal reference frame, the FACTIS epistemic system, FACTIS-E lifecycle continuity, and the Metroglobal Epistemic Principle (MEP-1) into a coherent architectural whole. The document does not propose policies, targets, governance mechanisms, or implementation methods. Instead, it defines the structural boundaries within which verified facts acquire meaning, consequences, and responsibility under conditions of irreversible change and distributed value creation.