The Lord of Pisa at that time was Uguccione of the Faggiuola of Arezzo… — The Prince
SAPIR 861
The Lord of Pisa at that time was Uguccione of the Faggiuola of Arezzo, who being in the first place elected their captain afterwards became their lord. There resided in Paris some exiled Ghibellines from Lucca, with whom Castruccio held communications with the object of effecting their restoration by the help of Uguccione. Castruccio also brought into his plans friends from Lucca who would not endure the authority of the Opizi. Having fixed upon a plan to be followed, Castruccio cautiously fortified the tower of the Onesti, filling it with supplies and munitions of war, in order that it might stand a siege for a few days in case of need. When the night came which had been agreed upon with Uguccione, who had occupied the plain between the mountains and Pisa with many men, the signal was given, and without being observed Uguccione approached the gate of San Piero and set fire to the portc
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