The Campbell House Museum opened on February 6, 1943, and is in the Greater St. Louis area, in the U.S. state of Missouri.

Robert Campbell purchased the house in 1853, and he and his family lived there until the death of his last surviving child in 1938.

In preparing an inventory and evaluation of the estate, leading experts in history, architecture and art were called.

All were amazed after visiting the house, pronouncing, "probably nowhere in America, possible nowhere else, is such an intact and integral display of elaborate and ornate furnishings of the middle Victorian period to be found, as in the Campbell mansion."

It was clear that the house needed to be saved and the unique and important story of the Campbells preserved.

A local history group called the William Clark Society began to organize an effort to save the building and its contents as a museum.

When the foundation got possession of the house in 1942 they immediately began raising funds to refurbish the interior with new wallpaper, paint and carpets.

This redecoration reflected a mid-20th-century concept of the Campbell's Victorian interior and was not an accurate restoration of what had existed in the 19th century.

[citation needed] The discovery of the Campbell House photo album allowed for accurate restoration of the interior rooms.

The project includes construction of a new street-level accessible entrance, two education spaces, a new gift shop, and lobby along with an elevator that will allow visitors to tour the house without using stairs.