Medieval government officials

300px|thumb|Prince Sico of Benevento, here pictured on one of his solidi, was the gastald of [[Acerenza before becoming prince]] A gastald (Latin gastaldus or castaldus; Italian gastaldo or guastaldo) was a Lombard official in charge of some portion of the royal demesne (a gastaldate, gastaldia or castaldia) with civil, martial, and judicial powers.