The phrase "a mansion which" is correct and usable in written English.
It can be used when describing a mansion and providing additional information about it.
Example: "She inherited a mansion which had been in her family for generations."
Alternatives: "a mansion that" or "a mansion where".
London also poured money into a ranch in Sonoma County, never profitable in his lifetime, and a mansion, which burned down before it was completed.
In December, the Tribune reported: Mr. Winston Chuchill is reported to be building in Vermont a mansion which is to be called after his latest book, "Carvel Hall".
Mr. Winston Chuchill is reported to be building in Vermont a mansion which is to be called after his latest book, "Carvel Hall". The profits from this volume are mentioned as exceedingly large.
Former Vice President Al Gore, preacher-in-chief of the carbon-footprint gospel, himself owns a mansion which burns through more electricity in a month than the average American family uses in a year.
Like staying in a mansion — which it was — except for the affordable price.
The video features Carey being held hostage in a mansion, which she escapes in a James Bond-themed plot.
Williams designed a $400,000 mansion which featured an 18-car garage.
Both represent immortality, life's final destination, as a heavenly mansion, which was then a popular Christian conceit.
We'll shoot all in one location, in a modern mansion, which serves as a maze for our heroine's adventures.
So when he was house hunting recently in the Philadelphia area, he used a new web technology called immersive photography to inspect a $2 million mansion, which he then bought without having once set foot inside.
After the fire, Phelps moved his family into a nearby mansion, which eventually became the first building of Holy Name Hospital, currently a modern hospital with 360 beds just across Cedar Lane from the Municipal Green.
