Abstract: An easily attachable/detachable decorative trim for architectural structures. The decorative trim includes a border having a decorative front side, and a back side including an easily releasable, e.g. hook or loop, fastener. The border has at least one fastener that is substantially continuous along its length. The border is constructed of a supple material, such as cloth or fabric, capable of conforming to irregularities in wall surfaces and bending around and/or otherwise conforming to inside and outside corners. A decorative trim kit includes at least one trim member and complementary easily releasable fastener(s) adapted for attaching to a wall, etc. The trim members of the trim kit may be visually distinct to permit interchangeable attaching of trim members to fixedly attached wall-mountable fasteners, thereby providing an associated change of decorative appearance. A method of decorating an architectural structure using such decorative trim is also provided.