Some photos or any other accessories?

As beautiful as the runners are, they really clash with the modern architecture. I'd keep the stairs clear of any rugs. If you want rugs in the flat hallways this one adds some warmth. But the colors all blend a bit too well, as does the size of the pattern. Go for a brighter, bolder rug color - like purple or blue?

Thank you about the suggestion. I really appreciate it. I can't replace the rugs at the moment,but I would like you to make any suggestions about the pictures on the walls,the colors and the way they will be replaced. If you have any advice please don't hesitate. You advice will be welcomed

I think we are asking you to consider taking out the carpet, not replacing it. I don't think there is a piece of art that will compensate for your rug. With your amazing house, they really hold back the space. I've pulled out shag carpet on stairs myself, much more involved than yours. It was work but you could do it! If you need traction, I'd prefer a rubber tread with a modern fair. To the left of the door, on the recessed wall, pick a color that compliments the rest of your house. I picked teal to boost color in the space instead of art work.

1st of all make sure the colour scheme of your walls is not similar to your flooring (stairs). I would suggest to have mono colour, light colour (may be completely white).

You can enhance view of your walls simply displaying wall art.

Also the down hall and stair hall should look consistent, so I would have similar colours of floor and wall everywhere, rather sectioning on parts, making sure stairs and small space down stairs look as one whole.

The carpet here is like from another house.. doesn't belong here. If you want to leave it you need to think about matching accessories such as pictures. But I would completely replace it with something what is not movable here. In this case I think you cannot really remove staircase rails.

It's very dark, some bright walls or a picture on the wall .or a light ... The carpet is not fit, old-fashioned. At this time there are a lot of thing for the stairs. As in the picture below

Your house is modern by looking at the railing ,so the problem is the runner ,

remove it , get some modern art for the walls .