As we, the ordinary people, put things in order, when you look into infinity, into the abyss, something huge and incomprehensible? We do this through lists, through catalogs, through collections in museums and through encyclopedias and dictionaries, concluded EKO. The breadth and depth of knowledge that he has accumulated in his 84 years, incomprehensibly vast, and it is known to anyone who has read any of his novels. They helped him to perfectly explain the origins, functions and importance of the list. In an interview with “der Spiegel” as classic examples of lists and lists in Western culture Eco led 2063 mistresses of don Juan, the contents of the boxes of Leopold bloom and a number of warships and generals mentioned in the “Iliad”.Research of the Eco and its increased interest in the lists generated not only an exhibition “Mille e tre” in the Louvre, but the book “the Infinity of lists: an illustrated essay” (The Infinity of Lists: An Illustrated Essay). They led him to different conclusions about why “list has prevailed again and again,” whether in the middle Ages with his “very clear ideas about the Universe”, the Renaissance or Baroque with “worldview, based on astronomy”, “the postmodern era” in which we live today, or any other time?Umberto Eco died in 2016, leaving a huge personal library. “In fact, maybe in her 50 000 books,” said the writer to the interviewer from the magazine “der Spiegel”, but he refused to order them to the list and specify the number. “When my Secretary ordered their catalog, I asked her not to. My interests are constantly changing, and so is my library“.