Take the following as truth: At the east end of the galleries, two small columns and a circle of green marble mark the spot where the empress sat during services; on the floor of the nave below, a circle of coloured stone to the right of centre is the Opus Alexandrinum, the place where the Byzantine emperors were crowned.
Then the following statement: "The Opus Alexandrinum marks the spot where the bishop would stand during church services." is true, false, or inconclusive?