Oxford, Bodleian Library, Rawlinson B 502 is a medieval Irish manuscript which presently resides in the Bodleian Library, Oxford. It ranks as one of the three major surviving Irish manuscripts to have been produced in pre-Norman Ireland, the two other works being the Lebor na hUidre and the Book of Leinster. Some scholars have also called it the Book of Glendalough, in Irish Lebar Glinne Dá Locha, after several allusions in medieval and early modern sources to a manuscript of that name. However, there is currently no agreement as to whether Rawlinson B 502, more precisely its second part, is to be identified as the manuscript referred to by that title.