Herein are disclosed methods and assemblies for adhesively mounting an article to two walls that meet at an angle (e.g., a corner). The methods and assemblies use first and second mounting plates that are deflectably and removably attachable to the article, with the first mounting plate being adhesively attachable to a first wall (e.g., by a piece of double-faced adhesive), and the second mounting plate being adhesively attachable to the second wall.