Romanticism and Existentialism

 I recently happened to participate in a session which talked about complementary areas or domains that combine especially in steampunk art. During this talk someone brought up the idea that romanticism  believed in the idea of complementary domains. It got me thinking as honestly, i did not know what romanticism was.  I looked it up and seems to be a literary and artisitic movement from the 18th century and some of the poets from that period thought to me seemed to be existentialist (once again history is not my strong suite and I am going by my feeling of the poetry than the period that defines romanticism or existentialism). This led me to try and look up what the overlap is between romanticism and existentialism. I do not know yet I am just trying to dig for fun when I find time.