Any career preservationist (and many amateurs) can relate to the frustration of realizing even one photograph of an altered structure could prove invaluable to a modern-day restoration or research project. For those of us who love historic buildings and might be working on a rehabilitation, for example, it’s important to document what you see before the structure begins to change. Once you alter physical aspects of a structure, you can never return it to what it was. In the end, maintaining a record of your property means that no matter what happens in the future, you and others will be able to know precisely what was once there. Explore six simple ways to create that invaluable record and ensure the legacy of the historic structure that matters to you.