The Great Seal of the State of Tennessee is the official insignia of the U.S. state of Tennessee. The Roman numerals XVI, representing Tennessee as the 16th state to enter the United States, are found at the top of the seal.[citation needed] Images of a plow, a bundle of wheat, a cotton plant, and the word 'Agriculture' below the three images occupying the center of the seal. Wheat and cotton were, and still are, important cash crops grown in the state.[citation needed] The lower half of the seal originally displayed a boat and a boatman with the word 'Commerce' underneath, but was changed to a flat-bottomed riverboat without a boatman subsequently. River trade was important to the state due to three large rivers: the Tennessee River, the Cumberland River, and the Mississippi River; the boat continues to represent the importance of commerce to the state. Surrounding the images in the original design were the words 'The Great Seal of the State of Tennessee' and 'Feb. 6th, 1796'. The month and day have been dropped in the modern design.[citation needed] (Source: Wikipedia.org, CC BY-SA)