Experiencing the beauty of Roman Catholic Church

Although being an Oriental Orthodox Christian myself, my friends most of whom are Catholic fate believers and so they once invited me for a gospel and a prayer at one of the Catholic Church's in Trastevere, Rome. At first, I wasn't confident enough to go but I also didn't want to say "No" because my friends invited me respectfully, so after some time I was able to make my mind and go.
But OMG it was so beautiful inside and also not to forget to mention the beautiful hymn words, I just can only say "Molta Bela Chiesa" in Italian which means very beautiful Church when translated to English.