Complex sentence: On 8 February, 1838, Pope Gregory XVI re-established the college of real protonotaries with seven members called "protonotarii de numero participantium" or numerary protonotaries, also known as participating protonotaries because they shared in the revenues as officials of the Roman Chancery.
Split into simpler sentences: On 8 February, 1838, Pope Gregory XVI re-established the college of real protonotaries with seven members called "protonotarii de numero participantium" or numerary protonotaries. They were known as participating protonotaries because they shared in the revenues of the Roman Chancery.