Arvonia’s two Queen Anne residences, Bryn Arvon and Gwyn Arvon, are landmarks of Virginia’s renowned slate industry and the Welsh immigrants who dominated it. The houses were built in the 1890s for the Welsh quarrymen brothers Evan and John Williams, who founded the Williams Slate Company in the 1870s and revitalized Buckingham County’s slate quarries. They capitalized on a growing market after the Civil War, when new construction throughout the country created an enormous demand for roofing materials. Their houses are distinguished not only by their Welsh names but by the extensive and creative use of slate inside and out, making them interesting demonstrations of the quarryman’s art and serving as advertisements of the quarry’s products. Although similar in design and the utilization of materials, the plan and elevation of each house differ. The Bryn Arvon and Gwyn Arvon property includes a collection of contemporary outbuildings.