The Liber was written during a long and troubled period, most likely between the end of 1194, when Emperor Henry VI finally took possession of southern Italy, after defeating his rival, Tancred, and 1197, the year of his death. The work, dedicated to Henry VI himself, whose praises and deeds he praises, contains a beautiful exaltation of the young Frederick, on the occasion of his birth, in Particula XLIII, verses 1363-96, at the end of the second book.
