Sentence:  Since the Supreme Pontiff has immediate, ordinary jurisdiction in every particular church (diocese) in the world, Canon Law affords every Catholic the right of appeal to the Pope. This is done through the Roman <WSD>dicasteries</WSD> (Congregations, Councils etc.). Letters should be brief, factual and respectful. 
Meaning of the word marked with <WSD> tags:  A ministry or department of the papal Curia, whether an administrative department of the Vatican City State, or a strictly ecclesiastical department of the Catholic Church.