The question is not only: "Did Troy really exist?" The better question is subtler: what can an archaeological site confirm, what does a poem transform, and where does legendary memory begin?
The real-world layer rests here on three points: Hisarlik, the Dardanelles and objects preserved in museums. Together they give the story a floor. They do not weaken the myth; they simply keep everything from being mixed together.
That distinction is important for the whole site. Troy can be a real landscape, a stratified archaeological problem, a poetic city, a memory of conflict and a cinematic image at the same time. The point is not to choose one layer against all the others, but to know which layer is speaking.