This coral is a Dohmophyllum helianthoides (Goldfuss) from the Middle Devonian Period. It was found in Gerolstein, Allemagne, Germany.
Here is another Dohmophyllum helianthoides (Goldfuss) coral from the Middle Devonian Period. It was found in Eifel, Allemagne, Germany.
These fossils are all stored in the Museum of Natural History in Paris, France.