The Radziwill Chronicle (often, including in the 1989 and 1994 editions, with one letter - Radziwill), or the Königsberg Chronicle - a chronicle monument presumably from the beginning of the 13th century, preserved in two copies - the Radziwill Chronicle itself, illustrated with numerous miniatures, and the Moscow-Academic. It is a "Tale of Bygone Years", continued with yearly records until 1206.
The book is provided as a file in PDF format, file size = 170 MB.