This book gathers the proceedings of the 18th World Conference on Seismic Isolation (18WCSI), held in Antalya, Turkey, on November 6-10, 2023. Organized by Turkish Association for Seismic Isolation (TASI) and endorsed by Anti-Seismic Systems International Society (ASSISi Association), the conference discussed state-of-the-art information as well as emerging concepts and innovative applications related to seismic isolation, energy dissipation, and active vibration control of structures, resilience, and sustainability. The book covers highly diverse topics, including earthquake-resistant construction, protection from natural and man-made impacts, safety of structures, vulnerability, international standards on structures with seismic isolation, seismic isolation in existing structures and cultural heritage, seismic isolation in high-rise buildings, and seismic protection of non-structural elements, equipment, and statues.