It is a German Deutsche Mark.
There's no such coin. Germany did not take the name Bundesrepublik Deutschland (German Federal Republic) until 1950.
Money
We need more information. The words "bundesrepublik Deutschland" just mean "Federal Republic of Germany" and are not the actual value of the coin. The coin will have a number on the front, representing its value in Marks (or Pfefning).
Please post a new, separate question with the coin's denomination.
There is a website called Numista that has coin pictures. Also on eBay and so on ...
Die Bundesrepublik Deutschland (The Federal Republic of Germany) is the official name for Germany. It is more often shortened to just Die Bundesrepublik or Deutschland
Kunst- und Ausstellungshalle der Bundesrepublik Deutschland was created in 1992.
Deutschland, or formally Bundesrepublik Deutschland
Federal Republic of Germany or Bundesrepublik Deutschland (in German). Bundesrepublik Deutschland (In English translation, The Federal Republic of Germany)
Deutschland ist eine parlamentarische Bundesrepublik
Bundesrepublik Deutschland
The official name of Germany is the die Bundesrepublik Deutschland. It is abbreviated to Bundesrepublik, BR Deutschland or Deutschland. The abbreviation BRD is not used officially. On automobile license plates in is abbreviated simply with 'D'. The official name of Germany in English is the Federal Republic of Germany. This was also the name of "West" Germany until the reunification in 1990. After reunification the former "East" Germany, die Deutsche Demokratische Republik,abr. DDR, ceased to exist and both parts took on the name of the former "West" Germany.