The document summarizes information about three Catholic places of worship: 1) The Sistine Chapel located in Vatican City, famous for papal conclaves and Michelangelo's frescoes. It was built in 1475-1483 and holds masses for the Pope. 2) St. Patrick's Cathedral in Melbourne, known for Gothic architecture. Construction lasted from 1858-1937 and it has served as the archbishop's seat since. 3) The Immaculate Conception Cathedral in Hong Kong, first built in 1843 but rebuilt after a fire. It became the city's cathedral in 1886 and remains the seat of the Catholic bishop of Hong Kong.