Queen Elizabeth II standing on a dais while reviewing a parade in 1946
A dais or daïs (/ˈdeɪ.əs/ or /ˈdaɪ.əs/) is any raised platform located either inside or outside a room or enclosure, often for dignified occupancy, as at the front of a lecture hall or sanctuary.
Historically, the dais was a part of the floor at the end of a medievalHall, raised a step above the rest of the room. On this the Master of the household or assembly (as it might be, the lord of the manor, Master of a College, Fraternity or Conventual house) dined with his senior associates and guests at the High Table, while the general company occupied the lower area of the room. In medieval halls there was generally a deep recessed bay window at one or at each end of the dais, supposed to be for retirement or greater privacy than the open hall could afford. The dais area often had its own doorway for admission from the Master's chambers, while access for the generality was from a doorway into the main area of the Hall.
At military parades, the dais is the raised, sometimes covered, platform from where the troops are reviewed, addresses made and salutes taken. It can also be with stairs and a throne.