Ah now I get what you are saying. Okay so remember this was all subconcious, but I think I added the articles since "Les Olympiades" seems like a whole name. Just "Olympiades" makes less sense since that could have different meanings, like people perhaps. In that sense, I considered "Les" as part of the name. Therefore, it is capitalized.

Porte d'Italy on the other hand is clear, there's only one interpretation, and therefore the article is not part of the name.

I am not saying this is right, just my brain doing brain things. I apologize if correctness is important for you, I will try to be more precise going foward.