The palace has undergone alterations and additions, e.g.
After extensive alterations, Bird Song, a bed and breakfast, was born.
It seems probable that the Vinaya and the four Nikayas were put substantially into the shape in which we now have them before the council at Vesali, a hundred years after the Buddha's death; that slight alterations and additions were made in them, and the miscellaneous Nikaya and the Abhidhamma books completed, at various times down to the third council under Asoka; and that the canon was then considered closed.
No evidence has yet been found of any alterations made, after that time, in Ceylon; but there were probably before that time, in India, other books, now lost, and other recensions of some of the above.
These changes may be brought about by external causes, such as the attacks of insects or of fungi, alterations in external conditions, &c., or by some unexplained internal disturbance of the morphological equilibrium.