The former Queen of King Juan Carlos I of Spain is reportedly selling her regent mansion for15 million pounds sterling

The history of the estate dates back at least 13 centuries and has withstood the trials and changes of the last 800 years, but perhaps most interesting is its owner and connections to European royalty. That's because Chyknell Hall is being sold by Corinna zu Sein-Wittgenstein, former mistress of King Juan Carlos I of Spain, father of the reigning King Felipe VI.

London's hidden gem - an estate with a stunning exhibition of drawings with a royal connection

Following restoration, the luxurious Leighton House opened alongside Sambourne House Museum last year. Now the exhibition "The Life of Drawing: The Best of the Leighton House Collection" is ready to attract art lovers

By Natasha Leake

The German-born Danish businesswoman, whose affair with the married monarch came to light in 2012, two years before his abdication in 2014, bought the estate for £6 million in 2015 and carried out extensive upgrades to the property.

Former King Juan Carlos I of Spain Patrick van Katwijk/Getty Images

"Chyknell is first mentioned in local records in 1209 when it was owned by the De Checkenhull family, who gave the estate its name," explains the estate's website. "The Grade II listed Regency style building was built in 1814 and still stands testament to elegant living today." The estate is also a popular wedding venue.