Giovanni da Siena
Giovanni da Siena was an Italian military engineer. In addition to the construction of the tower and the fortress of Castel Bolognese, a position in which he was assisted by Lawrence Bagnomarino, he was engaged in the fortresses of Cento, Solapur, of Porta Galliera and Finale Emilia, thus completing the work of Bartolino da Novara. Siena was an expert in hydraulic engineering and executed works to the banks of the Po.
