Complex sentence: Bramshill House is one of the largest and most important Jacobean mansions in England, described as one of the "glories of English architecture" by the historians Anthony Blunt and James Lees-Milne.
Split into simpler sentences: Bramshill House is one of the largest and most important Jacobean mansions in England. The house has been described as one of the "glories of English architecture" by the historians Anthony Blunt and James Lees-Milne.