The new series joins the property guru on a grand tour of Britain's most extravagant country houses to find out how and why they were built.

Exploring the stories behind the properties and the technical challenges involved in constructing these magnificent houses, Holkham Hall will take the spotlight in episode four, which is being screened on Tuesday night (9pm).

As he steps into the shoes of some of the nation's most ambitious homemakers, Mr Spencer discovers the palladian hall, built in the mid-18th century by Thomas Coke, 1st Earl of Leicester, is considered to be a masterpiece.

Today Holkham is a privately owned innovative 25,000 acre Estate set on one of the most beautiful stretches of the north Norfolk coastline.

As well as the hall, the estate comprises the Hall, deer park, the world famous Holkham National Nature Reserve and beach as well as a thriving collection of businesses centered on property, farming and leisure employing more than 250 people.

Recent enterprises include Pinewoods Holiday Park, two cafés, property development and the acclaimed Victoria Inn. In 2016 a permanent, interactive farming exhibition, Field to Fork, opened, which chronicles the story of food and farming, in which the Estate has played a pioneering role since the Agricultural Revolution. This summer has seen the launch of the Lady Elizabeth Wing – formerly a Victorian bowling alley – which has been converted into an impressive, contemporary wedding and events space for up to 400 people.