I am renting an apartment in Milan, Italy, and my room has an attached terrace with it. The terrace has these blinds, which have not been opened for centuries (so they may be stuck) and they have accumulated a lot of dust and grime.
These blinds are very typical in Milan, I've seen them in nearly every apartment complex I've been to.
On both sides it has two plastic cords, which are anchored to the floor. This is the left anchor
The lower one is the right anchor, top one belongs to another one of these blinds.
There are also the two accompanying cords which I am accustomed to seeing with blinds.
I cannot get them to open. Can someone please tell me what are these blinds called? And how may I even begin to open them up? Is there supposed to be some sort of locking mechanism somewhere?