Answer:
Both Industrial Revolution and French Revolution.
Step-by-step explanation:
Both events were sources for romanticism. Industrial Revolution grew strong together with the Age of Engligthenment promoting the supremacy of reasoning over emotions and the classicism, the idea that art should be based on Greek and Romans' beauty standards. Romanticism is a reply back against all these ideas preffering emotions over reason and setting the reference for art not in Classical Age, but in Middle Age and nature, an opposite idea of what was being promoted during the Industrial Revolution. On the other hand, French Revolution was the sources where romantic authors learned more about their ideologies, specially their individualism and their vision of seeing the artist with the potential of becoming heroes by elevating the society through high quality (romantic quality) works ans lifestyle.