Abstract: A method, kit and armature for assembling a number of upright slabs into a decorative enclosure are described herein. The armature includes a same number of armature elements than of slabs. A respective armature element is positioned at each intersection of two adjacent slabs. Each armature element includes a stopper for contacting onto one side face of corresponding slabs and a cable-receiving member mounted to the stopper. The armature further includes a cable that is mounted into the cable-receiving member and that is then tensioned to add rigidity to the assembly. The kit includes the armature elements, the cable, elastic bands and attachments that cooperate with the elastic band for holding the slabs in the predetermined configuration prior and during assembly of the armature. A tensioning element can further be used to tension the cable.