"Liberty Leading the People" is always my first choice in regard to RomanticNationalism. You could also see John Gast's painting in "American Progress". If you're looking for something other than painting then how about Romantic Nationalism that inspired stories to the tune of Folk Lore such as the Brothers Grimm? There are many ~ use your imagination and feel free to update the question and I will come back to see what more I can offer.
