Complex sentence: A park of around 7 hectares surrounding the house was landscaped to a plan by Humphry Repton in around 1807; the new landscaping remade some of the series of early 17th-century fishponds as ornamental water features, which are being gradually restored today.
Split into simpler sentences: A park of approximately 7 hectares surrounding the house was landscaped to a plan by Humphry Repton near 1807. The new landscaping remade some of the series of early seventeenth-century fishponds as ornamental water features, which gradually, are being restored today.