Origins
Prior to the Investiture Controversy, secular
authorities performed the appointment of church officials. Since a substantial amount of wealth was usually associated with
the office of bishop or abbot, the sale of Church offices was an important source of income for secular leaders. Since bishops
and abbots were usually part of the secular governments, because of their literate administrative resources, it was beneficial
for a secular ruler to appoint someone who would be loyal. Finally, the Holy Roman Emperor had the special ability to appoint
the Pope, and the Pope in turn would appoint and crown the next Holy Roman Emperor. Thus the cycle of secular investiture
of Church offices was ensured to perpetuate from the top down indefinitely.