The manuscript once belonged to the polish high noble family Radziwiłł — like ℓ 34 — hence name of the codex.
Most likely he went there with the powerful Lithuanian-Polish Radziwiłł family.
Janusz Radziwiłł | Mikołaj Radziwiłł | Michał Kazimierz "Rybeńko" Radziwiłł | Janusz Radziwiłł (1612-1655) | Radziwiłł | Mikołaj "the Black" Radziwiłł | Mikołaj Krzysztof "the Orphan" Radziwiłł | Michał Kazimierz Radziwiłł | Dominik Hieronim Radziwiłł | Antoni Radziwiłł | Mikołaj Radziwiłł (1470-1521) | Michał Gedeon Radziwiłł | Maciej Radziwiłł | Karol Stanisław "Panie Kochanku" Radziwiłł | Janusz Radziwiłł (1612–1655) | Hieronim Wincenty Radziwiłł | Franciszek Pius Radziwiłł | Bogusław Radziwiłł |
Struggling between his Polish subjects and the Prussian authorities, Radziwiłł found himself with little power, as effective power was executed by Oberpräsident Joseph Zerboni di Sposetti and the district governors heading the Regierungsbezirke of Posen and Bromberg.
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Apart from the guitar, cello and opera concertos performed by Radziwiłł himself, among his guests were Niccolò Paganini (concert in Poznań on 19 May 1829), Johann Wolfgang von Goethe, Frédéric Chopin and Ludwig van Beethoven.
Together with his cousin Janusz Radziwiłł in 1654 during The Deluge, or Swedish invasion of Poland, Bogusław Radziwiłł began negotiations with King Charles X Gustav of Sweden aimed at breaking the Commonwealth and the Polish–Lithuanian union.
His father Hieronim Mikołaj Radziwiłł was deported to a Gulag during the Soviet occupation of Poland and died on 6 April 1945.
In February 1945, the Radziwiłł family was deported by the NKVD to a labour camp in Krasnogorsk.