Simplify the following text for a Grade 14 native English-speaking person.
Original: The Roman Curia consists of a complex of offices that administer church affairs at the highest level , including the Secretariat of State , nine Congregations , three Tribunals , eleven Pontifical Councils , and seven Pontifical Commissions .
Simplified: The Roman Curia consists of the Secretariat of State , nine Congregations , three Tribunals , 11 Pontifical Councils , and a complex of offices that administer church affairs at the highest level .