In the past centuries, in the park adjacent to Villa Arconati of Bollate, there was a long dramatic avenue of horse chestnut trees (Aesculus hippocastanum), located at the end of the exedra plan of the French parterre, right in front of the southern part of the structure. This tree-lined pathway leads to the gate that links the park of the Villa to the adjacent forest. Here, the predominant tree species are deciduous, typical of the primeval forests of the Po valley, such as the hornbeam (Carpinus betulus), oak (Quercus robur), beech (Fagus selvatica) and chestnut (Castanea sativa). The last probably originated from Central Europe and Asia Minor, and can already be considered an indigenous plant of Italy. In fact, the Romans spread them over the Alps and the northern Apennines and then to other parts of Europe.