Complex sentence: On its first floor are four pairs of Corinthian columns and standing on the roof above these are four statues dating from 1792 by Richard Westmacott; these statues have been moved from the Irish Houses of Parliament.
Split into simpler sentences: On its first floor are four pairs of Corinthian columns and standing on the roof above these are four statues dating from 1792 by Richard Westmacott. These statues had been moved from the Irish Houses of Parliament.