The remaining church in my parish was built in 1901, electrical service may well have been a later improvement and it was considerably before amplifiers could be purchased.
Yet, they still had masses and other liturgical acts, most of which included readings and/or sermons.
What was done then? Why the need for microphones, are we really less than our predecessors who got along fine w/o them.
Your old school churches were built to consider the acoustic situation.