The reason being there's expensive wallpaper on the wall, so I can't drill hole.. Also because it has vertical straps protuding 1-2mm outwards, I can't use 3M tapes as it will not have 100% contact between the wallpaper and photo frame. Moreover, 3M tapes are not recommended for wallpaper.
Any other way to hold the photo frames on the wall? Let say those frames are at least 30x30cm, not more than 50x50cm.. It's those thick border frames from Ikea..
Or if all else fail, is there any innovative ways to showcase the photos (it's meant for my gallery/office)..
Please throw your recommendations. Thanks!