The Carolingian chapel has frescoes by Giovanni d'Asciano with stories of St. Benedict and currently acts as sacristy.
The agreement provides that day to day operation of the port is contracted out by the authority to Patrick Ports Hastings, a division of Asciano Ltd.
Trequanda borders the following municipalities: Asciano, Pienza, Rapolano Terme, San Giovanni d'Asso, Sinalunga and Torrita di Siena and consists of the following villages: Trequanda, Castelmuzio and Petroio.