Note:  Do not rely on this information. It is very old.

Dais

Dais (Low Latin discus, a dining table), the name of the raised platform at the end of a college or castle hall, on which the lord and his immediate companions, or the head and fellows, sat to dine. In French the word has been again transferred to the canopy which sometimes was over this part of the hall, and thence to the canopy over a throne or altar.