San Lorenzo main treasure is the Relic of The Holy Milk which, according to tradition, was given to Count Guido Guerra, Lord of Montevarchi, by Charles I of Naples on 26 February 1266 after the victorious Battle of Benevento when Guido Guerra successfully led a Guelph formation of heavy cavalry against an onslaught.
In 1269, in the age of Anjou, Paolo de Giga, soldier, was made Baron of Caccavone by direct investment by Charles I of Anjou.
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Robert's successor, Guy (II) of Dramelay (the Aragonese version's Guy), is known to have enlarged the barony by acquiring parts of the Lisarea as well as the neighbouring fief of Mitopoli (in 1280), served as bailli of the Principality for Charles I of Naples in 1282–85, and died shortly after.