This is an old building that still has many old building systems in use.
As you can see from the picture, these wires are still in use with these old ceramic insulators.
These are unique and not seen very often. Some of these old cloth wires are worn and can give you a shock or short out.
Just be aware in these older buildings. For example, in this particular building, there are a lot of places that had obvious signs of water leaks. We know how that turns out when electric is involved.
Stay safe and be careful out there. Take the time to look at the older buildings in your area. There is a lot to see and learn.