The term 'Peter or Paul, e.g.' can refer to two different people: SAINT Peter and SAINT Paul. SAINT Peter was one of the twelve apostles of Jesus Christ and is considered to be the first Pope of the Catholic Church. SAINT Paul was also an apostle of Jesus Christ and is known for his missionary journeys and his letters to early Christian communities. The crossword solutions for this term are 'SAINT' (5 letters) and 'TSAR' (4 letters). TSAR is a title used by rulers of Russia from the 15th century until the Russian Revolution in 1917. It is similar to the title of Emperor and is derived from the Latin word Caesar.