Base isolation
![Tomb of Cyrus is said to be the oldest base-isolated structure in the world.](/Images/godic/202412/23/CyrustheGreatTomb_220572047.jpg")
![LA City Hall, the tallest base isolated building in the world[1]](/Images/godic/202412/23/Los_Angeles_City_Hall_(color)_edit12048.jpg")
![Base isolation demonstration at The Field Museum in Chicago](/Images/godic/202412/23/Earthquake_Protector_at_The_Field_Museum2048.jpg")
Base isolation, also known as seismic base isolation or base isolation system, is one of the most popular means of protecting a structure against earthquake forces. It is a collection of structural elements which should substantially decouple a superstructure from its substructure resting on a shaking ground thus protecting a building or non-building structure's integrity.