Lambert M. SurhoneISBN: 978-3-6399-9902-0;
The Pactum Sicardi was a treaty signed on 4 July 836 between the Greek Duchy of Naples, including its satellite city-states of Sorrento and Amalfi, represented by Bishop John IV and Duke Andrew II, and the Lombard Prince of Benevento, Sicard. The treaty was an armistice ending a war between the Greek states and Benevento, during which the Byzantine Empire had not intervened on behalf of its subjects. It was supposed to last five years.
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