To be precise, what "we" (Heinrich Schliemann) found were the ruins of multiple cities, in multiple archeological layers, in a region that is rife with such things. We... well, he, then proceeded to declare one of those cities "Troy" and even took pictures of his wife with some jewels he found which he proclaimed to be "the jewels of Helen of Troy" [1].

That should suffice to underline the uncertainty, from a purely scientific point of view, of what, exactly, was found by Schliemann. My opinion is that this man has caused no end of damage to any attempt to find the historical truth, if any, of the Homeric epic. I've had a few fights with fellow Greeks who were convinced that Schliemann really-really found Troy, the actual city from the Iliad, which was a true story then. A friend once told me that not only Troy was found, but that it was "seven cities", as Troy is described in the Iliad; most likely a reference to the multiple layers of ruins at the place excavated by Schliemann. Some of whom were indeed destroyed by fire, suggesting war, if memory swerves, but not all and in any case there have been so many wars in the thousand years since the first city was built there that we might as well assume it was aliens who first destroyed it.

... which some people inevitably will.

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[1] Some of the history of those excavations is on wikipedia:

https://en.wikipedia.org/wiki/Troy#Excavation_history

The rest I know by dint of being born Greek and having read my fair share of ancient history (extracurricularly, obviously) as a child. I might misremember some things.