Complex sentence: Some of the earliest Marian churches in Rome date to the 5th century, such as Santa Maria in Trastevere, Santa Maria Antiqua and Santa Maria Maggiore, and these churches were in turn decorated with significant works of art through the centuries.
Split into simpler sentences: Some of the earliest Marian churches in Rome date to the 5th century, such as Santa Maria in Trastevere, Santa Maria Antiqua and Santa Maria Maggiore. These churches were in turn decorated with significant works of art through the centuries.