Complex sentence: When the station opened a replica of the Eleanor Cross in Red Mansfield stone, also designed by Edward Middleton Barry, was erected in the station forecourt, based on the original 13th century Whitehall Cross that had been demolished in 1647.
Split into simpler sentences: When the station opened a replica of the Eleanor Cross in Red Mansfield stone, also designed by Edward Middleton Barry, was erected in the station forecourt. It was based on the original 13th century Whitehall Cross that had been demolished in 1647.