Van Briggle Pottery, center bowl and flower frog, circa 1920's. Van Briggle Pottery was founded by Artus and Anne Van Briggle in 1900 in Colorado Springs, Colorado. Van Briggle began producing art pottery in 1901. Artus and Anne were both accomplished decorators for Rookwood Pottery but left due to Artus's failing health. They believed the climate and altitude change in Colorado would benefit Artus's tuberculosis. He died in 1904 and Anne continued to run the business. Through the years the pottery has changed hands but is the oldest continual art pottery in the United States. The large 14 inch center bowl has eight sides and is 2 1//2 inches high, with a matte turquois to sea blue glaze. There is a tight crack on one side of bowl. Bottom of bowl is signed on buff ground. The flower frog has 3 sitting frogs and is also a matte glaze of turquois to sea blue. The underside is marked with the double A mark. The frog measures 5 inches in diameter and is 2 1/2 inches high. Frog is in good condition with no chips, cracks, or repairs.