This is the Rosemount Mansion, listed on the National Registry of Historic Places, was built with Castle Rock, Colorado – pink volcanic stone using the Richardsonian Romanesque style. It sits on 1 square city block in town with huge lawn and garden areas, which provided plenty of room for the family to play and enjoy each others company.

This 37 room mansion was built for the well-to-do John A. and Margaret Thatcher in 1893. They commissioned a well-known New York architect Henry Hudson Holly to create their dream mansion. Naming it Rosemount, after Margaret’s favorite flower, this mansion became the beloved family home for 75 years

This impressive construction project cost the Thatchers $60,750.00, which was quite a chunk of change! But if you divide $60,750.00 by the 75 years of family use, the price of the house works out to be 800 dollars a year in the long run.

The Thatchers got a lot for their investment. The oak staircase is described as being “dramatic” and connects the floors of the mansion. It is no wonder this 24,000 sq. ft. 3 story mansion is called “Colorado’s Crown Jewel,” or referred to as a “Castle,” for it showcases the “Grandeur of a bygone era.”
Margaret Thatcher had excellent taste. She chose all the furniture, wall and window treatments, and all of the 26 Persian, Turkish and Oriental hand-woven area rugs found throughout the mansion. John and Margaret collected art from all their world travels.

After Margaret died in 1922, various members of the Thatcher family lived in Rosemount throughout the years. When the last of the children, Raymond died in 1968, the Thatcher descendants sold / gave the mansion and its grounds to a non profit organization, the Rosemount Museum, which keeps the grounds and mansion in tip top shape through memberships, running a gift shop and a restaurant, called “The Carriage House”. From what I know this was probably and excellent idea, as everyone with this type of property describes it as “a black hole” or “a money pit” and this is just too nice a property to fall into disrepair! 11/28/09