Wikipedia dates acquacotta's origin only to "ancient history" with no specific period, era or century given anywhere in the article; the dish is described as ancient peasant food from the Maremma with no citable starting point.
What would resolve this A food-history or archaeological source giving a specific period, century or documented early reference for when acquacotta as a bread-and-broth soup first took shape in the Maremma.
Openfood historyAcquacotta (Wikipedia)