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     1.  We should no 
    longer call Roger's assizes "of Ariano" 
    2.  The large number and variety of 
    subjects in the assizes must mean that they were promulgated over a long 
    period of time.  Roman law provided the foundation of many of them.  
    Roger must have brought jurist(s) to Palermo to help him draft his 
    legislation 3. 
    Sometime between 1140 and 1154 King Roger ordered his assizes compiled by an 
    unknown jurist who knew Roman law very well.  The jurist arranged his 
    collection by following the organization of Justinian's Digest and the Code.  
    A copy of this collection is probably preserved in Vat. lat. 8782.  A 
    collection of laws is not a code in the twelfth century. 
    4. The Vatican manuscript's text is 
    closest to the one that Frederick II's jurists used when they compiled the
    Liber Augustalis.  The Montecassino manuscript probably bears 
    witness to another private collection during the reign of William I or 
    William II.  |