Complex sentence: Sassoferrato's work was held in high regard through to the mid-nineteenth century reaction against sweet devotional art work reinforced in England by the critical commentary of John Ruskin.
Split into simpler sentences: Sassoferrato's work was held in high regard through to the mid-nineteenth century. However, by the late 19th century, reaction against sweet devotional art work reinforced in England by the critical commentary of John Ruskin.