Antiphon-Lectern
From BiblePortal Wikipedia
Antiphon-Lectern [1]
a lectern which stands in the centre of the floor of a choir, chancel, or chapel, facing the altar, at which the antiphons are solemnly chanted. Here the cantors stand at certain periods of the service in order to command a full view of the choir, and so as to enable the choir to follow them both in time, tune, and due regularity. (See Lectern).