After Giotto's death there is a wide gap in the annals of the Duomo, for in 1348 the great plague desolated Florence, and the work came to a standstill. After it had passed, however, there followed, as a natural consequence, a sudden outbreak of pious superstition. Immense sums had been bequeathed by dying men to the Church to purchase salvation; and the Duomo, begun sixty years before, seemed hardly to correspond with the demands of the present age. It was accordingly resolved to adopt a new design for it on a grander scale than that planned by Arnolfo; and while the breadth was to remain the same, the height and length were to be increased, and the eastern end of the church to be larger. The oversight of the work was entrusted to Francesco di Talenti, and in 1357 the new foundations were begun. The main forms of the new building were, in great part, determined by such of the old structure of Giotto's time as was left standing, and by the original scheme of Arnolfo. But the taste of the age had changed, and in grafting the newly arisen classical ideas upon the original, the architects achieved a result which was neither good Gothic nor good Classic. For some years the work was now carried slowly but steadily forward, and in 1407 the eastern tribune with its five chapels was completed, and the work was ready to be crowned by a dome. But here a great difficulty was encountered. The increase in the original dimensions and the height of the walls had made it necessary to span an enormous space, for the diameter of the octagon to be covered was now one hundred and thirty-five feet. The records of architecture could show no such dome as this must be. The overseers of the work were confounded, and knew not how to proceed; and, in their desperation made a public proclamation in 1418, that whoever wished, might make a model for the dome, or of anything pertaining to its construction. Fifteen models were presented, and over them there were months of public deliberation and discussion. It was not until March, 1420, that a final conclusion was reached, and the celebrated plan of Filippo Brunelleschi was adopted.