This session will examine the relationship between symmetry and modularity at one, and ornamental art, carpets and interlaced ornaments on the other side. In many cases, working with archaeological material, it is necessary to make a reconstruction of complete ornaments from their parts preserved on bone, stone, ceramics or textile. One of the possible ways is to use symmetry (anti symmetry, coloured symmetry). The other approach to such a reconstruction could be based on the modularity.