Artificially layered perovskite oxide superlattices present excellent opportunities for the development of tailored materials with intriguing properties. PbTiO3 in particular is a compound which when combined with other perovskite oxides in a finely layered structure enables new phenomena, for example, interfacially driven improper ferroelectricity in PbTiO3/SrTiO3. In this talk we present work on two new PbTiO3 based systems we have fabricated and studied using a range of experimental techniques. These two systems demonstrate quite different, yet equally fascinating, behavior. In PbTiO3/SrRuO3 superlattices which contain SrRuO3 layers of single unit cell thickness we show that as the PbTiO3 layers are reduced in thickness there is both an insulator-metal transition and an increasingly important effect from compositional inversion symmetry breaking. In PbTiO3/CaTiO3 superlattices we show that changes in the relative thickness of the constituent layers allows rotation of the polarization direction, leading both to fascinating domain structures and a greatly enhanced piezoelectric response when compared to the PbTiO3 parent material. Beyond the exceptional properties of the materials themselves these two new examples serve to highlight the virtually limitless potential of the artificial superlattice approach to materials design.