Abstract- Recently, a number of much needed innovations have captured the attention of the earthquake engineering communities worldwide; the stiff braced rocking core, as part of conventional steel earthquake resisting systems (ERS), the introduction of low damage systems and components, the use of triple and mixed multiple seismic structures, and the sustainable seismic design (SSD) philosophy with a view to economy and environmental protection. SSD has the most challenging issue confronting structural engineers for decades. Regardless of carbon footprint reductions, unless a structure is designed for seismic sustainability it would be disposable with greater human diomfort, economic loss and harm to the environment. In the present context design implies planning for controlled seismic resistance, environmental protection, construction economy and Post-earthquake Realignment and Repairs, (PERR). In SSD the practicality of PERR is as important as the relevance of the theoretical assumptions, therefore, the non-lateral resisting items are carefully designed not to partake in seismic resistance. All Earthquake resisting structures (ERS) are designed for practical, residue-free recentering while their energy dissipating components are detailed to remain repairable/replaceable after the event. In the interim new categories of ERS, and innovative ideas have also been introduced. The authors hope this, and related articles will form the basis of SSD guidelines for earthquake prone resilient cities.