What ties the space together is its Old World, European aesthetic, Mrs. Olmstead said. 'My husband calls it Provescany,' she said—a mix between the styles of Provence and Tuscany. There are 10 French doors that open up to the landscaped grounds, Mrs. Olmstead said, and shutters they added to windows extend the French motif. 'It's a house where you can open it up when the weather's glorious,' she said.

Over the years the home has been renovated by different owners who have reconfigured the space. This back entry, shown here in the foreground, was once the front entrance, Mrs. Olmstead said. The doors lead into a Spanish-tiled foyer with skylights designed to illuminate their art. A floral water color painting the couple bought as a wedding gift 35 years ago hangs on the back wall. It 'hasn't faded one bit,' Mrs. Olmstead mused.

The couple has hosted several parties in the home, which Mrs. Olmstead said is ideal for large gatherings. The garden room, which runs about 48 feet long, is shown here. There is an audio system both inside and outside the home.

Mrs. Olmstead is the president of A. Brown Olmstead Associates, a public relations firm. Mr. Olmstead owns an executive search firm. A home office, with wood-paneled walls and French doors, is shown. The home includes four gas fireplaces.

The dining room, pictured here, has been good for more intimate gatherings. Mrs. Olmstead would host dinner parties of up to 12 in the room.

Mrs. Olmstead calls this entry room the 'duomo,' because of its domed shape and raised ceiling.

The 'duomo' features roughly 18-foot ceilings, Mrs. Olmstead said. One of her initial concerns was in finding art that could cover the large wall space. She found this set of 8-foot-tall paintings after attending a local ball, and says they are two of her favorite pieces in the home. Furnishings aren't included in the list price.

The main living space measures about 6,900 square feet, according to the listing agents, while an office space, exercise space and other areas brings the total to about 9,900 square feet. One of the home's five bedrooms is shown. An additional office space could be converted into two additional bedrooms, the agents said.

There are seven bathrooms, which feature five ornate, chinoiserie-style sinks by Sherle Wagner, one of which is shown. A custom-made doll house that Mrs. Olmstead found at an estate sale is also pictured.

Mrs. Olmstead says they put 'at least' $1.2 million into upgrades on the property, including an overhaul of the pool area and gardens, shown here. Tall trees flank the private garden area while plantings surround the pool. 'You could be anywhere in the world' while sitting in this outdoor space, she said.

The couple also built out a new garage and office area, part of which is shown here. Above the garage is about 2,000 square feet of office space, as well as an exercise area.

In addition to her public-relations business, Mrs. Olmstead has taken on several other projects. One business, Garden Frou Frou, saw Mrs. Olmstead create a line of fashionable clothing for gardeners. One of the reasons why the couple moved to this home was because of the gardening opportunities the roughly 1¼-acre property offered.

The living room, shown here, was used to hold 'salons' for house guests. Mrs. Olmstead said she could fit a standing group of about 100 people in the sizable room.

The couple is selling because they are 'unfortunately downsizing,' Mrs. Olmstead said, but they expect to keep a presence in the area. A breakfast area is shown.

The home was listed in May for just under $3 million. Kathy Olmstead, Mrs. Olmstead's daughter-in-law, and Dawn Mullins of Harry Norman Realtors share the listing.