Complex sentence: In 1867, Davies acquired seven acres to its south and commissioned Henry Austin to design the largest single-family home in New Haven, a, Second French Empire Revival mansion at the highest point of the hill.
Split into simpler sentences: In 1867, Davies acquired seven acres to its south and also commissioned Austin as its architect. Austin designed the the largest single-family home in New Haven, a, Second French Empire Revival mansion at the highest point of the hill.