an old coin

This coin is not made of silver or copper from that period, but rather of something hard like stone.

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Please show only the coin and not the background, which is of no interest. Learn how to crop an image.

Agreed — it's easier for us to work with larger pictures with as little bacground as possible. In this case, on a desktop, the first picture turns out to be quite good once the link (not the image) is opened in a new tab, then cropped:

This is an VRBS ROMA bronze coin issued under Constantine. Urbs (or in Latin: Vrbs) Roma = “City of Rome”. You can compare with the list in the link and find out where it was minted (the mintmark, in case you don't know, is below the wolf-and-twin allegory on the reverse).

thank you