Zeno Cosini is a fictional character from the novel "The Name of the Rose," written by Umberto Eco. He serves as the narrator and is a complex figure who reflects on his life and experiences. The story is set in a 14th-century Italian monastery, where Zeno's observations provide insight into the philosophical and theological debates of the time. Zeno's character is often seen as a representation of the struggle between reason and faith. His reflections explore themes of knowledge, truth, and the nature of reality, making him a significant figure in Eco's exploration of medieval thought and culture.