The red granite block marker above has an opening cut into it. The opening has two bronze gates slightly open and set into it. Open gates are a common symbol found in American cemeteries.
Most often the open gates symbol is found carved into a gravestone–not in 3D.
The open gates, which are central to the Last Judgment, are opened to a banner above that reads “AT REST”. The gates here represent a passageway from one realm to the next. The gates are the portal for saved souls to make their passage from the Earthly realm to the Heavenly realm upon Christ’s return.