 In 2004 , Martin Gronewald and Robert Daniel published three fragments of papyrus from the Cologne Papyrus Collection , which taken with the existing fragment from Oxyrhynchus provided the almost complete text to five stanzas of the poem . The Cologne papyrus , preserved on <unk> , is from the early third century BC , making it the oldest known papyrus containing a poem by Sappho . 
