Extremely Rare One-Gallon Stoneware Jar with Cobalt Foliate Decoration, Stamped "T.H. WILLSON & CO. / HARRISBURG, PA", circa 1852, semi-ovoid jar with tooled shoulder and flattened rim, decorated around the shoulder with four brushed cobalt foliate motifs, flanking the impressed maker's mark, "T.H. WILLSON & CO. / HARRISBURG, PA.", surrounding an image of the Pennsylvania State Capitol. Impressed "1" above. Considered among the most decorative 19th century American stoneware maker's marks known, the T.H. Willson "capitol stamp" is rarely seen, achieving an icon status among Central Pennsylvania stoneware enthusiasts. The building represented on this jar is known as the Hills Capitol, which was destroyed by fire in 1897. Very nice condition. A hairline across underside, continuing 2 3/8" onto base on one side and 1 5/8" onto base on another side. A short in-the-firing surface line on interior, not visible on exterior. Typical light wear to inner rim for lid.