One of the most important works of Joachim Lelewel, it contains three treatises on Polish legislation: Historical Dissection of Polish Civil and Criminal Legislation up to the Jagiellonian times ; Diplomats of the 12th, 13th and early 14th centuries able to prove what he said in the historical dissection of Polish legislation up to the Jagiellonian times ; Critical Dissection of the Wiślickie Statutes.