Context: In cities other than Rome, the name cardinal began to be applied to certain church men as a mark of honour. The earliest example of this occurs in a letter sent by Pope Zacharias in 747 to Pippin III (the Short), ruler of the Franks, in which Zacharias applied the title to the priests of Paris to distinguish them from country clergy. This meaning of the word spread rapidly, and from the 9th century various episcopal cities had a special class among the clergy known as cardinals. The use of the title was reserved for the cardinals of Rome in 1567 by Pius V.

Question: What term was given to certain church men of honor?
Answer: cardinal

Question: When is the earliest date of using the term cardinal as honorable church men used?
Answer: 747

Question: When was the title of cardinal reserved for the cardinals of Rome by Pius V?
Answer: 1567

Question: In regards to the word "cardinal" being used in cities other than Rome, who sent a letter to Pippin III?
Answer: Pope Zacharias

Question: In what year was the letter sent?
Answer: 747

Question: Which pope declared that cardinals would be from Rome?
Answer: Pius V.

Question: In what year did the pope make the declaration?
Answer: 1567

Question: What term was applied to certain political leaders as a mark of honor?
Answer: Unanswerable

Question: What did Pippin III call priests of Paris to distinguish them from county clergy?
Answer: Unanswerable

Question: What century did the term cardinal spread quickly throughout various Muslim cities? 
Answer: Unanswerable

Question: In what year did Pope Zacharias reserve the title for the cardinals of Rome? 
Answer: Unanswerable

Question: Who had a special class among clergy known as priests in the 9th century?
Answer: Unanswerable