This is Brighton Pavilion,built by Nash for the Prince Regent,later George the Fourth,and where the Prince entertained his long term mistress Mrs Fitzherbert.He also had a string of other lady friends, and a number of illegitimate children.More at http://www.victorianweb.org/art/architecture/indian/10.html and for mistreses http://www.georgianindex.net/mistresses/prinny_mistresses.html