Complex sentence: The first church built in Boston for Catholics was the Holy Cross Church on Franklin Street, designed by Charles Bulfinch and built in 1803; it was demolished in 1862 and replaced by the Holy Cross Cathedral.
Split into simpler sentences: The first church built in Boston for Catholics was the Holy Cross Church on Franklin Street, designed by Charles Bulfinch and built in 1803. It was demolished in 1862 and replaced by the Holy Cross Cathedral.