The Frogmore Plantation Complex, located on Saint Helena Island, in Beaufort County, South Carolina, is significant for several reasons.

[2][3] First, the plantation home, along with its contributing properties (i.e. pump house, barn, windmill/water tower), offers an excellent example of the area's architectural development from 1790 to 1920.

After the Civil War, the house was purchased by two northern missionaries — Miss Laura Matilda Towne and Miss Ellen Murray — who founded the historic Penn School, located within the Penn Center.

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