This is an osella (a coin or a medal) issued by Venezia (Venice) in commemoration of a bountiful harvest. The female figure is Abundance or Plenty and she is holding two cornucopias filled to the brim with goodies. Paolo Renier was ruler of Venice between 1779 and 1797.
We did quite a bit of research to figure out your coin, Nicholas. The coin shown on this page is in wonderful condition. It comes from Numismatica Varesi in Pavia, Italy, and CoinQuest thanks Varesi for use of their image. My guess is that Varesi's coin would sell retail for $400 to $500 US dollars. If you had a coin like this to sell, Varesi or another reputable coin dealer might pay $150 to $300 for it. The mark-up is necessary to keep the dealership solvent.
Since an osella is not strictly a coin, it does not appear in the standard coin catalogs. As to value, we agree with this assessment from RhinoCoins.com:
worn: $200 US dollars approximate catalog value
average circulated: $300
well preserved: $500
fully uncirculated: $1000
Remember that the concepts presented on our Terminology page apply.