Laurentian Codex or Laurentian Letopis is a collection of chronicles that includes the oldest extant version of the Primary Chronicle and its continuations, mostly relating the events in the northeastern Rus' principalities of Vladimir-Suzdal.

Rus' chronicle or Russian chronicle or Rus' letopis was the primary type of Rus' historical literature. Chronicles were composed from 11th to 18th centuries, generally written in Old East Slavic about Kievan Rus' and subsequent Rus' principalities and histories. Chronicles were one of the leading genres of Old Rus' literature, and were prominent in medieval and early modern Eastern and Central Europe.