Grouseland, the William Henry Harrison Mansion and Museum, is a National Historic Landmark important for its Federal-style architecture and role in American history.

Soon after his arrival in Vincennes in 1801, Harrison began planning the construction of a home on 300 acres (120 ha) of land he purchased adjacent to the town.

[4][7] Grouseland was designed by the architect William Lindsay and constructed in the Federal style, reminiscent of the aristocratic homes where Harrison spent his boyhood in Virginia.

Grouseland was built at great personal expense to Governor Harrison; it is believed to have cost an estimated US$20,000 at the time of its construction.

At least one biographer surmises that Harrison's motives in constructing such an elaborate home in the wilderness included establishing the respect due to him as governor, despite his relative youth at the time.

On August 12, 1810, Harrison met with Tecumseh, who was accompanied by 100 to 400 braves (sources report different numbers), on the lawn in front of Grouseland.

Situated at the northwest corner of Park and Scott streets,[2][4][8] within the present-day Vincennes Historic District, it is owned by the local chapter of the Daughters of the American Revolution, the organization that saved the building from destruction.

The property is maintained by the Grouseland Foundation, a volunteer board of directors composed of DAR and non-DAR members that manages the structure and programs.

[15] Grouseland's present-day site on a half-city block about 100 yards (91 m) from the Wabash River was part of Harrison's 300-acre (120-hectare) estate in Vincennes.

The first floor of the main house has a parlor (council chamber) to the left and a dining room to the right of an entry and hallway leading to a library at the rear.