Ioachim Chronicle

The Ioachim Chronicle or Ioakim Chronicle (Иоакимовская Летопись), also spelled Joachim or Ioakim) is a chronicle allegedly discovered by the Russian Imperial historian Vasily Tatishchev in the 18th century. The alleged Ioachim Chronicle, which has never been found, is part of the "Tatishchev information" (Татищевские известия), which is not to be trusted until it is supported by another source.

Authenticity
The chronicle is believed to be a 17th-century compilation of earlier sources describing events in the 10th and 11th centuries concerning the Novgorod Republic and Kievan Rus'.

The original chronicle was reportedly lost and the contents are known through Tatishchev's History of Russia (История Российская). However, Tatishchev's historiography is dubious, since his second (printed) redaction of his History of Russia is much more detailed than his first (handwritten) redaction and is based on sources no longer, and some say never, extant. Indeed, Tatishchev's sources are so problematic, that Iakov Solomonovich Lur'e (1968) wrote of "'Tatishchev information' (data found only in that historian.)" Be that as it may, Tatishchev concluded that the chronicle was written by Ioakim Korsunianin, the first bishop of Veliky Novgorod (ca. 988–1030). More recent studies indicate that the chronicle was more likely compiled by the Patriarch Joachim of Moscow (d. 1690).