Lorredan wrote:
The thing is the geography of any Italian area is vastly different to what one imagines it might have been in the 15th Century. Fermo was an important place and Ancona was a small port, whose buildings had been burned to the ground several hundred years before Sforza came on the scene.
~Lorredan
First of all, the landscape crammed into the narrow frame of the arch/card cannot be too realistic, especially if the area covered extended from Cremona to the Marche of Ancona; moreover important cities are missing, e.g. Bologna (on the road from Cremona to Rimini, which is north of the Marche).
It is a symbolic landscape meant to approximate the geopolitical situation and signify the major players at the time of the 1441 wedding: Visconti's realm (here, Cremona), Visconti's enemies of Florence (more on that below) and Venice (Chioggia/Ravenna), and the condottiere they all coveted: Sforza (his still relatively new fiefdom of the Marche of Ancona).
How do I figure Florence into any of this? You have severely downplayed the significance of Ancona: Florence and its contado could not produce enough wheat to feed itself (I believe it was down to 40% self-sufficient by the time of the famous castato of 1427) and it was accordingly supplmented with surplus from Sicily via Pisa and with surplus from Apulia/Puglia via Ancona (as well as being a major trade port to the Levant). The earliest Florentine banking concerns such as the Bardi got rich from this so when Cosimo opened a branch of his own bank there in 1436 he was following a true and tried trade route that was central to Florence's well-being. But the enormous amount he invested there was clearly to buy off Sforza from going to war against Florence for Visconti. This is all clearly stated in Parks, Medici Money: Banking, Metaphysics, And Art In Fifteenth-century Florence, p. 116f
http://books.google.com/books?id=3MPmpQ ... nk&f=false
...and in De Roover, The Rise and Decline of the Medici Bank: 1397-1494: p. 59f.
http://books.google.com/books?id=3ptzaU ... na&f=false
One can only guess at delusional Filippo's thinking here but it had to have gone something like this: Medici's new Ancona bank would become a crippling write-off and the grain supply from there to Florence cut-off with Sforza in the fold. So to Filippo this was a twofold masterstroke if it came to fruition: his son-in-law keeping Venice at bay (perhaps he even imagined Sforza warring his way up the coast, taking Ravenna then Chioggia "pushing Venice back into its lagoon") and choking off Florence from a strategic investment and food supply route. On paper it made sense - its just that ultimately Filippo wasn't matching Cosimo's florins.
Phaeded
PS Ancona was significant enough to the Ottomans ("the Levant trade") that they produced this map of it: