Part 2
In the earliest large public liturgies, Roman and Byzantine, the ambo/pulpit was an elevated structure right in the middle of the nave. There were no pews, so the faithful were free to move around, and for the readings, they moved towards and stood around this ambo. This arrangement may have been adopted directly from the synagogue. Given that there were no sound system, and basilicas (the type of Roman building used) were cavernous, this arrangement was culturally perfect for proclaiming and explaining a sacred text to a captive audience. 

Transposed to our culture, we use a sound system and we read from the front of an auditorium facing the education targets; and we proclaim the scripture in their native language whenever possible. 

If you are familiar with the full Missa Solemnis, Jay, you will see an interesting moment in the organic development unique to the Roman rite. The Epistle is read from one side, and the gospel from the other; and both are read FACING the people.