Complex sentence: The hospital building, an imposing brick Italianate/Romanesque structure, located at the northern end of what is now the Unitec campus, was the largest building in the colony when it was built in the 1860s.
Split into simpler sentences: The hospital building, an imposing brick Italianate/Romanesque structure, located at the northern end of what is now the Unitec campus. The The hospital building was the largest building in the colony when it was built in the 1860s.