The Free Press, New York.
Its a great story.
In the year of 1502, Da Vinci was hired by Cesare Borgia as a chief military engineer in the Borgias ever increasing desire vincere non è importante è l'unica cosa che conta juventus for more lands and power.
Commands were given to protect the works from the Pisans while also widening the second channel.
Leonardo transferred his studio to Milan and then Rome, where he would produce remarkable work, while Machiavelli retreated from public life for a time and used his forced leisure to write.Internal rebellions threatened to topple the citys republican government which Machiavelli served, and the city as a whole was at war with Pisa.He dug two channels all the way from the Arno to the Stagno di Livorno, instead of combining them at the junction with the Arno, he underestimated the time it would take and the number of workers needed, and, disastrously, dug the channels shallower than.Instead of flowing to Pisa, it would flow around Pisa and into Florence. .Machiavellis tumultuous career took numerous twists and turns, but resulted in one of the western worlds most famous works on political philosophy, The Prince, which established its writers place in history.The flood-prone Arno, however, made the task an impossible challenge.
Leonardo continued and expanded his interest in water, rivers, canals and hydraulics in the various cities in which he later lived, although he was known primarily for his genius as a painter and died in France in 1519.
Macmillan, Canada; and Wikipedia.
This was no more evident than in Italy, where many of the best known artists (think, for example, Raphael, Botticelli, Michelangelo) lived and worked.
Both cities were situated on the Arno river, but since Pisa was situated further upstream, it could potentially dam the river and block Florences access to the sea. .By mid 1503, Leonardo was at the military camp outside Pisa, acting as an hydraulic engineer, with the job of working out how to deprive the Pisans of the river that flowed through their city.Leonardo had many ideas involving the Arno and the potential for Florence to have its own seaport.It is also thought that Leonardo might have been operating as a Florentine spy, because Machiavelli failed to mention his name in dispatches, despite being in the same town at the same time and despite Leonardos fame.Machiavelli was, for a time, Florences emissary to Cesare Borgia.3 The Battle of Anghiari was never finished and now lost.Not bad for a conversation along a river and the type of cross fertilisation of ideas that leads to all great innovation.History is sometimes made by seemingly insignificant moments that turn out to have been pivotal in hindsight-and sometimes what didn't happen proves to be as important as what did.Leonardos drawing of the Arno and the weir to be built alongside to prevent water flowing down the new channel.
Leonardo da Vinci: The Marvellous Works of Nature and Man, Oxford University Press; on Machiavelli, Italy, Florence and Pisa was obtained from Colliers Encyclopedia 1982.