Complex sentence: After his death, his widow married Charles Schreiber (1826--1884) in 1855, an academic, fine arts collector and Conservative Party politician who sat in the House of Commons between 1865 and 1884.
Split into simpler sentences: After his death, his widow married Charles Schreiber (1826--1884) in 1855. He was known for being a fine arts collector and Conservative Party politician who sat in the House of Commons between 1865 and 1884.