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The largest, most ostentatious, fascinating, and plain over-the-top mansion in Charleston was built in 1876 for successful entrepreneur George Walton Williams. Designed in the Italianate style, the property comprises 35 rooms, a grand ballroom, Japanese water gardens with koi ponds, a private elevator, three levels of piazzas, ornate chandeliers, a 90-foot cupola, and decorative painting and lighting designed and installed by Louis Comfort Tiffany. When Williams died in 1903, the house was inherited by his son-in-law, railroad financier Patrick Calhoun (thus the name). Restored by local attorney Gedney M. Howe in the 1980s and 1990s, the house was sold again in 2004 and remains privately owned, albeit open for tours throughout the year.