This nation does not have a national anthem, but it does have a piece of music composed by Charles "Funeral March of a Marionette" Gounod that has served in that capacity since 1949. This song notably mentions another nation's national capitol five times in the first two lines. What is this nation which prior to 1949, used "Marcia trionfale" by Viktorin Hallmayer as its de facto national anthem?
Vatican City