Complex sentence: On 21 October of that year the artist remarried Isabella de Fren, the 32-year old daughter of Andries de Fren, secretary of the Council of Brabant.
Split into simpler sentences: On 21 October of that year the artist remarried. His second wife was Isabella de Fren, the 32-year old daughter of Andries de Fren, secretary of the Council of Brabant.