Captatio benevolentiae
From Infogalactic: the planetary knowledge core
Captatio benevolentiae (Latin for "winning of goodwill") is a rhetorical technique aimed to capture the goodwill of the audience at the beginning of a speech or appeal. It was practiced by Roman orators, with Cicero considering it one of the pillars of oratory.[1]
During the Middle Ages it was used in court cases to gain the judge's favor, with lavish praise of the judge's wisdom considered most effective by Guillaume Durand.[2] In parallel, the techniques of the captatio benevolentiae began to be used in the prologues of chivalric romance novels, addressing the readers and trying to have them view the work favourably.[3]