The Complete Collection of Russian Chronicles (Russian: Полное собрание русских летописей, romanized: Polnoe sobranie russkikh letopisei[1][2], abbr.
PSRL[1][2]) is a series of published volumes aimed at collecting all medieval East Slavic chronicles, with various editions published in Imperial Russia, the Soviet Union, and Russian Federation.
The chronicles were assembled by the Archaeographical Expedition of the Russian Academy of Sciences (starting in 1828).
They were prepared for publication by the Archaeographical Commission, established in 1834 as part of the Ministry of National Enlightenment.
In 1977, Ludolf Müller discovered that thousands of textual variants in the Radziwiłł Chronicle and Academic Chronicle were not reported, or reported incorrectly, in Volume 1 of the PSRL.