They had however spared those of Desio, some 30 km north to Milan, as there converged three important trade routes from Como, Erba and Lecco.
Samas olid nad säästnud Milanost ligikaudu 30 km põhja pool oleva Desio kindlustusi, kuna seal ühinesid kolm olulist kaubateed (Como, Erba ja Lecco suunal).