Bara Imambara
بڑا امام باڑہ — The Great Congregation Hall
Built in 1784 by Nawab Asaf-ud-Daula during a great famine — simultaneously feeding 22,000 labourers and creating a monument for the ages. Its central hall is the largest arched enclosure in Asia built without a single beam or column. Hidden within is the Bhool Bhulaiyaa — a labyrinth of 1,024 identical doorways that has bewildered visitors for centuries. The step-well (baoli) descends to the Gomti river underground, while the mosque beside it perfectly balances every minaret.