A new coordination polymer [Ag 2 L 1.5 (NO 3 ) 2 (CH 3 CN)] n (1) (L = N,N -bis(furan-2-ylmethylene)hydrazine) has been synthesized and characterized by IR, UV, elemental analysis, 1 H NMR, and X-ray crystallography. The most remarkable structural feature of the polymer is that it displays a 2D coordination polymer featuring three types of metallacyclic rings, bimetallic 8-membered, tetrametallic 14-membered, and hexametallic 20-membered rings. The luminescent properties of the title polymer were investigated in the solid state at room temperature.