Complex sentence: In 1568 the school moved to a purpose built school room, which still remains, the commemoration stone of which was laid by Browne's stepdaughter Dorothy Huddleston, and her husband Edward, Browne having died in 1567.
Split into simpler sentences: In 1568 the school moved to a purpose built school room, which is extant. The commemoration stone laid by Browne's stepdaughter, Dorothy Huddleston, and her husband Edward, Browne himself having died in 1567.