Despite being often criticized, the notion of face has recently started to be applied in diachronic pragmatic investigations. These studies focus on speech acts such as explicit directives, requests, apologies, and terms of address. This trend suggests that “face” can be used as a valid tool to understand speakers’ behaviors in historical contexts. This study also uses the notion of face to investigate the speech act of thanking in Old Saxon and Old High German, filling a long-standing gap in the literature. The results of this study suggest that, although the expression of gratitude was common and perceived in a positive way in these two societies, this speech act could only be found when the addresser was in a lower social position than the addressee. On the one hand, these findings provide evidence to the claim that the effects of a speech act on the speaker’s or hearer’s face are mostly determined by the situation in which a specific behavior takes place. On the other hand, they also point to the strictly hierarchical structure of the Old Saxon and Old High German societies.