Face (French), face, facing or front; hence “portrait en face”, one that allows the facial features to be seen entirely. – In the art of fortification, the faces are the two lines (facial lines), which form the angle at the vertex of bastions, forts etc. (cf. fortress). Our photo shows the faces of “Sa Maison” Bastion of Provence in Floriana, Malta.
Source: Meyers Großes Konversations-Lexikon, 6. Auflage 1905–1909