Petronio congratulates Rodolfo, believing that the king will marry because of Artena's water source. Rodolfo designates Petronio and Orlando as emissaries of his intention to King Augustus. Catarina shows interest in marriage with Rodolfo. Afonso assures Rodolfo that his grandmother feared that the union of Artena and Montemor would bring undesirable consequences to Calia.
