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Firenze, Biblioteca Laurenziana, Codex Florentinus, sine numero ca. 600 AD
Justinian's Digest. Cited for the first time in 1075.
Justinian (527-565), Mosaic in
San Vitale, Ravenna
Digest 1.4.1
Ulpianus libro primo Institutionum
Quod principi placuit, legis habet vigorem (What pleases the prince has the force of law)