Primary Chronicle
The Novgorod First Chronicle () or The Chronicle of Novgorod, 1016–1471 is the most ancient extant Old Russian chronicle of the Novgorodian Rus'. It reflects a tradition different from the Primary Chronicle of the Kievan Rus'. As was first demonstrated by Aleksey Shakhmatov, the later editions of the chronicle reflect the lost Primary Kievan Code (Начальный Киевский свод) of the late 11th century, which contained much valuable information that was suppressed in the later Primary Chronicle. However, an author to the chronicle was never established.