Complex sentence: The manor house, which replaced a medieval house, was built in 1859 in 30 acres of scenic parkland on the coast by Viggo de Neergaard, an estate owner.
Split into simpler sentences: The manor house was built over a land area of 30 acres, replacing an old medieval house, on the coast, with scenic surroundings. It was built by Viggo de Neergaard, an estate owner.