Framed! 18 Picture-Perfect Gallery Walls
Stair Gallery The wall flanking your staircase is a perfect place for a gallery. The project peeve? It's tough to keep your frames level and evenly spaced while following the natural ascent of the stairs. If you like the creative part of the job more than the planning stage, consider using a DIY gallery kit that includes a template, such as those available from Picturewall.
Vancouver Interior Designers: How to Hang Art on a Staircase Wall - Maria Killam - The True Colour Expert
from the blog "First we went to Ikea for several sizes of Ribba frames. Then we're going to take out the paper inside first (which is basically the size of the frame) and tape them to the wall to make sure we are happy with the arrangement" - great idea!