The song is "Age of Cathedrals" from the musical Notre-Dame de Paris in French, Italian, and Spanish. Since high-rising gothic cathedrals of the late 15th century exist in France, Italy, and Spain, I used these three languages.
Lol since Hetalia is about the countries and there's a character for the US I felt like it'd be fitting to post this. XD
If you happen to live in the states you should!(not mandatory) seeing in your states is fitting or not XD
This is really a Finnish folksong. These are the real lyrics to this song. You hear them in this song and I am not going to say them in this description.