Complex sentence: The district was added to the National Register of Historic Places on August 24,1979, approximately that includes much of the village now known as West Mystic and many buildings from the 19th century.
Split into simpler sentences: The district was added to the National Register of Historic Places on August 24,1979. The historic district is an approximately area that includes much of the area of the village now known as West Mystic and includes many buildings from the 19th century.