Complex sentence: The Imperial Arcade building, designed by prominent Sydney architect Thomas Rowe, was constructed over a two-year period (1889-1891) and declared open on 16th July 1891 by the then Mayor of Sydney, William Patrick Manning.
Split into simpler sentences: The Imperial Arcade building was designed by Thomas Rowe and constructed over a two-year period from 1889 to 1891. It was declared open on 16th July 1891 by the then Mayor of Sydney, William Patrick Manning.