After this, in the year 1329, they wrought an altar-panel of marble for the Church of S. Francesco at Bologna, in a passing good manner; and therein, besides the carved ornamentation, which is very rich, they made a Christ who is crowning Our Lady, and on each side three similar figures--S. Francis, S. James, S. Dominic, S. Anthony of Padua, S. Petronius, and S. John the Evangelist, with figures one braccio and a half in height. Below each of the said figures is carved a scene in low-relief from the life of the Saint that is above; and in all these scenes is an infinite number of half-length figures, which make a rich and beautiful adornment, according to the custom of those times. It is seen clearly that Agostino and Agnolo endured very great fatigue in this work, and that they put into it all diligence and study in order to make it, as it truly was, a work worthy of praise; and although they are half eaten away, yet there are to be read thereon their names and the date, by means of which, it being known when they began it, it is seen that they laboured eight whole years in completing it. It is true, indeed, that in that same time they wrought many other small works in diverse places and for various people. Now, while they were working in Bologna, that city, by the mediation of a Legate of the Pope, gave herself absolutely over to the Church; and the Pope, in return, promised that he would go to settle with his Court in Bologna, saying that he wished to erect a castle there, or truly a fortress, for his own security. This being conceded to him by the Bolognese, it was immediately built under the direction and design of Agostino and Agnolo, but it had a very short life, for the reason that the Bolognese, having found that the many promises of the Pope were wholly vain, pulled down and destroyed the said fortress, with much greater promptness than it had been built. It is said that while these two sculptors were staying in Bologna the Po issued in furious flood from its bed and laid waste the whole country round for many miles, doing incredible damage to the territory of Mantua and Ferrara and slaying more than ten thousand persons; and that they, being called on for this reason as ingenious and able men, found a way to put this terrible river back into its course, confining it with dykes and other most useful barriers; which was greatly to their credit and profit, because, besides acquiring fame thereby, they were recompensed by the Lords of Mantua and by the D'Este family with most honourable rewards.