The wooden boxes that are otherwise unsung home for the great works in the vaults all these years double as eloquent backdrops to the exhibits at a momentous show that the National Gallery of Modern Art (NGMA) is holding in the capital city. Summer is anyway peaking in Delhi; so a walk down the corridors featuring ‘Itihaas’ can give a vivid idea about the 20th-century sculpting in a big and ancient country that is India.