A 34-room Romanesque Revival mansion built between 1884 and 1888 by W.A. Clark, the most ostentatious of Butte's three Copper Kings. The interior is preserved almost untouched: nine fireplaces, frescoed ceilings, hand-painted Tiffany stained glass, a built-in pipe organ, and bedrooms with the original wallpaper.
The house is still privately owned, operating as a bed-and-breakfast — you can sleep in one of the bedrooms — and tours run during the day. Worth the modest entry fee for the look at how a copper baron of the 1880s actually lived.