This is a fantastic forum. A question you can't get answered is probably hard to find. The risk is that you might get too many answers.
Regular plugs!
Special plugs!
Chemical anchors!
The wall might collapse!
Use a ladder up to the third floor!
Use the chimney!
No problem attaching it to the wall!
I quote an old comment to the answer to a difficult question: We are still as puzzled as before. But we are puzzled on a higher level now!