Systems and kits for decorating walls include a plurality of décor assemblies and a plurality of complementary fastening structures. The décor assemblies include a décor element and a releasable fastening structure providing first fastening elements. The complementary fastening structure includes a base, a pressure sensitive adhesive disposed on the base, and second fastening elements. The first fastening elements are releasably mateable with the second fastening elements to define a releasable fastening system. During use, a complementary fastening structure is releasably applied to a wall, and is connected to and supports one of the décor assemblies via the releasable fastening system. The releasable fastening system can comprise low profile hooks and loops, exhibiting relatively low holding power.