Complex sentence: Mary Frances Sherwood Hopkins Searles (March 8,1818--July 25,1891) was a US citizen who successively married two millionaires, was one of the richest women in the United States and thus in the Location got to live out their architectural interests.
Split into simpler sentences: Mary Frances Sherwood Hopkins Searles (March 8,1818--July 25,1891) was an American millionaire. During her lifetime, she was one of the richest women in the United States, and used her wealth to realize her architectural interests.