Welcome to the online home of Ohio’s original statewide preservation organization, now in its 42nd year of providing education, training, and advocacy for the state’s rich collection of historic resources. This new website is designed to connect Ohioans together in sharing information and resources as we all seek to secure a future for Ohio’s past. We invite you to learn about us, our Ohio’s Most Endangered Historic Sites program, and to experience the country’s first AI-energized communications network for historic preservation tools and techniques.
Photo: Downtown Mansfield – Preservation Ohio Photo


2024 List of Ohio’s Most Endangered
Historic Sites Announced

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