The main structure of the National Veterans Memorial and Museum (NVMM) in Columbus, Ohio, USA consists of three concentric, free-form rings made of in-situ concrete. Each ring is made up of a series of intersecting arches. This design element, which is visible from the outside and inside, supports the roof of the building, which has a diameter of approximately 61 m.
Inside there are galleries, event spaces, training and office spaces. An external ramp along the rings provides access to the roof terrace of the building for events and commemorations. The rings were designed as architecturally sophisticated exposed concrete surfaces.