Alexander Thynn, the 7th Marquis of Bath, owned the Longleat Safari Park in Wiltshire and the larger Longleat Estate.
Longleat is well known for being the location of the famous BBC Animal Park, presented by Kate Humble and Ben Fogle.
Lord Bath died yesterday at the Royal United Hospital in Bath after being admitted on March 28.
A statement from the estate reads: “It is with great sadness that we must announce that Lord Bath has died at the age of 87.
“The family would like to express their appreciation for the dedicated team of nurses, doctors and other staff who took care of Alexander in a professional and compassionate way during these extremely difficult times for everyone. “
“They would politely ask for a period of privacy to deal with their loss. “
Lord Bath owned a large estate.
At its peak, it ranked 359th in the Sunday Times Rich List with an estimated wealth of £ 157 million.
He was head of the Bullingdon Club at the University of Oxford before founding the Wessex Regionalist Party, which called for the devolution of power to the regions.
Lord Bath began painting in Paris, returning to his Wiltshire home to paint some of the rooms with scenes from the Kama Sutra.
In his splendor, he was well known for having several partners, in addition to his wife.
He claimed to have 72 “wifelets”, some of whom lived in chalets on his estate and were immortalized in paintings he had placed on the walls of the house.
Those who included models and a 17-year-old Sri Lankan.