History 7 By gregory.otjen 8000 BCE Potatos are cultivated 1200 Pope Urban II calls for the Crusads 1254 Marco pollo born 1275 Marco polo sets off 1299 Marco polo returns 1300 renasance 1440 Printing press created 1511 Sermon delivered Denounces treatment of the natives 1542 Book by de la casas Publicly criticizes the spainyards treatment of the natives 1600 scientific revalution