 Roberts delegated the assignment of artwork to the muralist Francis David Millet , noted for his work as decorations director for the 1893 World 's Columbian Exposition in Chicago ; Millet assigned himself two lunettes on the third floor and a dozen small panels in the second floor corridors . Also on the third floor , Millet assigned two lunettes to Charles Yardley Turner , as well as eight more to Kenyon Cox . Cox also provided the groined ceilings . Edwin Blashfield painted the glass dome and the four pendentives between its supporting arches . The Tudor @-@ style legislative chamber of the Board of Freeholders on the second floor was adorned with murals by Howard Pyle depicting early life of the Dutch and English in New Jersey . This room has been called " one of the handsomest legislative chambers in the United States . " 
