See inside the $7M Denver mansion that currently serves as a butler school

This turn-of-the-century historic landmark has been everything from a personal home to a butler training school, and it's now on the market for $7 million.

History: The house was built in 1901 for Gertrude H. Cuthbert (Hill), Sen. Nathaniel P. Hill's daughter. Sen. Hill brought smelting to Colorado, which ignited the mining industry. Cuthbert (Hill) was the director of the Children's Hospital Association, the Denver Orphans' Home and the Y.W.C.A.

• Since 1994, the home has served as a school to train professional butlers and household managers. Founded by Mary Louise Starkey, Starkey International Institute has been in business for 40 years.
• 1,700 professional servants have graduated from the school and work for elites around the world, including the king of Jordan.

The exact address is 1350 N. Logan St. At 12,574 square feet, it has 11 beds and 6.5 baths.

• The house has the potential to be a short-term rental or a bed and breakfast.

Design: "This kind of old Georgian beauty has a life of its own," Starkey, the current and third owner, said. She's leaving most of the home's furniture and decor to preserve the heritage of the home, as most pieces were made specifically for it. She bought them when she moved in 27 years ago.

• With large rooms and high-end finishes, this house was made for entertaining.

Highlights: Four stories, game room, home gym, outdoor living area, pizza oven, three-car garage, huge kitchen with a true butler's pantry, birch wood floors.

Listed by: Stephanie Johnston and John Dovenbarger at Berkshire Hathaway HomeServices IRE Englewood.

Here's a look around:

All photos courtesy of Stephanie Johnston