Compass Rose
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Also known as a 'windrose', or nautical compass, the compass rose has been used for thousands of years as a way to display the orientation of the cardinal directions (north, south, east, and west) on a map or nautical chart. Early forms of the compass rose were known as wind roses because no distinction was made between a cardinal direction and the wind which emanated from that direction. The modern compass rose has two rings in order to differentiate between true north and magnetic north.
This shape reminds me of a Monstrance, which is used to display the consecrated host of the Eucharist, generally in the Catholic tradition.
Sedlec Ossuary