Complex sentence: Built about 1854 for an arms manufacturer, it is one of the city's finest early examples of Italianate architecture, and was in the early 20th century home the Charles Herbert Allen, a prominent local politician.
Split into simpler sentences: Built about 1854, it is one of the city's finest early examples of Italianate architecture. In the early 20th century, it was the home of Charles Herbert Allen, a prominent local politician.