cenacle or coenacle (ˈsɛnəkəl)

— n
1. a supper room, esp one on an upper floor
2. ( capital ) the room in which the Last Supper took place

[C14: from Old French, from Late Latin cēnāculum, from cēna supper]

Source: Dictionary.com.

I asked myself whether the abbey were truly a place of concealed mysteries, of illicit attempts to reveal them, and of grim threats. Because it now seemed to me, on the contrary, the dwelling of sainted men, cenacle of virtue, vessel of learning, ark of prudence, tower of wisdom, domain of meekness, bastion of strength, thurible of sanctity.

Source: The Name of the Rose by Umberto Eco.