On 30 December 1996 — the penultimate working day before his retirement — Justice Kuldip Singh, sitting with Justice Faizan Uddin, delivered the Taj Trapezium judgment: 292 enumerated industries within a 10,400 square kilometre polygon around the Taj Mahal were directed to switch to natural gas or relocate outside the Zone, with labour-protective relief for workers in relocated units. A digest of how the Bench operationalised the *Vellore* principles, why it created a monument-centric zoning template, and how the continuing-mandamus device powered later orders from CNG-Delhi to subsequent TTZ rulings.