A metallabenzene (e.g., 1) is a transition-metal analog of benzene in which one methine (CH) is replaced by an isoelectronic MLn fragment, yet the molecule retains "aromatic" physical and chemical properties. Although three dozen or so such structures are known, only recently did we report the first general route that allows entry into this class of molecules using suitably substituted 3-(2-iodovinyl)cyclopropenes (e.g., 2). This new method takes advantage of the inherent reactivity of the strained cyclopropene to undergo ring cleavage or ring expansion. This talk will focus on our latest studies involving metalla-aromatics of Ir (e.g., 3) and Pt (e.g., 4).