The Chronicle of Rivius is a German-language manuscript often cited by Teodor Narbutt in his nine-volume work on the history of Lithuania and journal articles.
Lithuanian researcher Artūras Dubonis pointed out many inconsistencies in its authorship, unclear provenance, factual and chronological fallacies, and concluded that it is most likely a forgery, though more extensive study is required for a conclusive determination.
Narbutt prepared a Polish translation of the most important parts of the chronicle and intended to publish it in a collection of primary sources on the history of Lithuania.
Narbutt lamented that fragments of Rotundus work, including two genealogical tables, were lost when the last pages of the manuscript burned during a fire at his library in 1838.
In his comments to the translation, Narbutt even debated which version is more correct (though both are proved wrong by the 13th-century Livonian Rhymed Chronicle).
[1] However, in his chronicle Rivius provided his grandfather's biography that supplied no new information in addition to what was already known from the encyclopedias of Johann Friedrich von Recke and Karl Eduard von Napiersky, published in 1831, and of Friedrich Konrad Gadebusch [ru], published in 1777.