No traces of this are alluded to by modern travellers, but in all likelihood it was only formed of rubble plastered (as is the case still with such Nirvana figures in Indo-China) and of no durability.
It is related of the founder himself, the Maha-vira, that after twelve years' penance he thus obtained Nirvana (Jacobi, Jaina Sutras, i.
The Buddha, on the other hand, obtained Nirvana in his 35th year, under the Bo tree, after he had abandoned penance; and through the rest of his life he spoke of penance as quite useless from his point of view.
Seeing Kassapa, who as the chronicle puts it, was as well known to them as the banner of the city, the people at first doubted who was the teacher and who the disciple, but Kassapa put an end to their hesitation by stating that he had now given up his belief in the efficacy of sacrifices either great or small; that Nirvana was a state of rest to be attained only by a change of heart; and that he had become a disciple of the Buddha.
Many have already followed it, and conquering the lust and pride and anger of their own hearts, have become free from ignorance and doubt and wrong belief, have entered the calm state of universal kindliness, and have reached Nirvana even in this life.