Ипатьевская летопись
The Hypatian Codex dates to the 15th century. It was written in what are today Ukrainian lands and incorporates much information from the lost 12th-century "Kievan Chronicle" and 13th-century "Galician–Volhynian Chronicle". The language of this work is the East Slavic version of Church Slavonic language with many additional irregular east-slavisms (like other east-Slavic codices of the time). Whereas the Laurentian (Muscovite) text traces the Kievan legacy through to the Muscovite princes, the Hypatian text traces the Kievan legacy through the rulers of the Halych principality. The Hypatian codex was rediscovered in Kiev in the 1620s, and a copy was made for Prince Kostiantyn Ostrozhsky. A copy was found in Russia in the 18th century at the Ipatiev Monastery of Kostroma by the Russian historian Nikolai Karamzin.