"Year 7 of Liberty" means 7 years into the French Revolution and after the end of absolute monarchy in France. Amor Patriae means something like "Love of Country".
There were jetons at this time period that had spending value, like the Monneron brothers' issues. This one does not look to me like something that would have been spent/exchanged. More curious, however, is the material used here. Any ideas?
City views on coins are always very popular, and fetch a premium at auction. This is a great find, and though I don't have more specifics to offer, I'm sure it's got some value.