Complex sentence: Built in 1849 as the carriage entrance to Wolverhampton railway station, it opened three years before the station itself; the two buildings were built in a similar style, but the station building was replaced in the 1960s.
Split into simpler sentences: Built in 1849 as the carriage entrance to Wolverhampton railway station, it opened three years before the station itself. The two buildings were built in a similar style, but the station building was replaced in the 1960s.