Soldato
Use a pair of mirror/picture plates, one on each side, with plasterboard rawlplugs. I've hung loads of mirrors & pictures like this, including an extremely heavy 6' wide photo.
Keeping the picture flush to the wall minimised the moments on the fixings thereby minimising the forces trying to pull it out of the wall.
Keeping the picture flush to the wall minimised the moments on the fixings thereby minimising the forces trying to pull it out of the wall.