Through a glass clearly

I see these over 100-year old vines. Somehow they have managed to survive all this time in the orangeri behind this building at historical Sundby Säteri, untouched by the great Wine Blight. These vines are the thickest I have ever seen. Trees really.

I wonder what variety it is - quite doubtful that the people minding this place have any detailed iformation. Ahem, could i cut away a little scion?