But the Emperor, to whom the possession of Siena was invaluable and who (since the fortresses of Livorno and Florence had been consigned to Duke Cosimo) had no other strong place in Tuscany, was resolute. He answered Malavolti graciously, assuring him that it was not to take away, but to maintain the liberty of Siena and to secure good government, that he was having this fortress built; but when, a little later on, more ambassadors arrived, "in mourning robes, as though in anticipation of the loss of their liberty," he answered shortly that his imperial orders had been given, and refused to listen to any further representations on the subject. "We must drink this bitter chalice," wrote Girolamo Tolomei, "and swallow this red-hot trivet." In the meanwhile, the foundations of the citadel had [Illustration: _An old Fanale in the Piazza San Giusto_] been laid on the Poggio di San Prospero, the site of the present Lizza, though the architect Peloro had, according to Sozzini, "made the design of such greatness for the benefit of his city, that his Catholic Majesty would not finish it in thirty years." Dressed in red cloth, Don Diego came every day that he was in Siena to hurry on the work. But a weird figure rose up in the midst of it. The hermit Brandano had wandered through Italy preaching repentance, clothed in sackcloth with a halter round his neck, a Crucifix in one hand and a death's-head in the other. On the eve of the sack of Rome he had appeared in the Eternal City, foretelling the scourge, denouncing Pope Clement and his cardinals. Beaten and imprisoned, he had next gone as a pilgrim to our Lady's shrines in Spain, where he had been thrown into the dungeons of the Inquisition. Now he suddenly stood out on the hill-side, watching the builders at their work, chanting aloud in weird wailing tones the text of the psalm: _Nisi Dominus aedificaverit domum_, "Except the Lord build the house, they labour in vain that build it"; and then, when men stopped to listen, he cried again in a louder tone: _Nisi Dominus custodierit civitatem_, "Except the Lord keep the city, the watchman waketh but in vain." Driven off the works, he returned again and again, declaring that he spoke by the will of God. Diego sent him to the galleys, but the Spanish commander at Port'Ercole found no cause in him and sent him back to Siena. Here he designed what Sozzini calls _un bellissimo e notabil colpo_, and hurled two huge stones at the head of a red-coated Spaniard, fondly imagining that he was the hated Diego. Arrested and brought before the governor, he calmly avowed his attempt to kill him for the sake of his fellow-citizens. Either an unwonted access of magnanimity or superstitious fear made the Spaniard spare his life, and he was merely banished from Siena on pain of death, the guards at the gates being bidden never to let him enter the city again.