have included wood and probably coal to keep a fire going continuously during the night, and there is a large chimney leading to the top room at the Tower of Hercules. The example from Dover has been converted at some stage into a simple bell tower for the adjoining church. Lighthouse keepers may have added combustible liquids to reduce the expenditure on fuel and keep the light steady during gales, but little information exists in the literature from the time. It may also be possible that the light was protected from the wind by glass windows, and large mirrors may have assisted in projecting the light beam as far as possible. It is likely that lighthouses would have required considerable labour for transporting the fuel and maintaining the flame. At Cape Hatteras in the 1870s, one keeper and two assistants kept themselves busy by tending more sophisticated flames from powerful oil lamps. While artistic representations assist us in re-creating a visual image of lighthouses, they present many problems. Depictions of lighthouses on Roman coins, inscriptions, carvings, and mosaics present an inconsistent view of the actual appearances of the structures. Most show a building with two or three stories that decreases in width as it ascends. The limited size of coins could cause the producer of the coin to alter the image to fit on the surface. The similarity in depictions of lighthouses is symbolic rather than accurate representations of specific beacons. Europe During the middle age times, Roman lighthouses fell into disuse, but some remained functional, such as the Farum Brigantium, now known as the Tower of Hercules, in A Coruña, Spain, and others in the Mediterranean Sea such as the Lanterna at Genoa. As navigation improved, lighthouses gradually expanded into Western and Northern Europe. One of the oldest working lighthouses in Europe is Hook Lighthouse located at Hook Head in County Wexford, Ireland. It was built during the medieval period, in a sturdy –circular design. A century later, in the Late Middle Ages, a tower was built by Edward the Black Prince at Cordouan near the Gironde estuary. One hundred years later, in 1581, Henri III asked architect Louis de Foix to build a new one. Building the lighthouse took twenty-seven years and was finally completed in 1611. The tiered Cordouan symbolized French maritime power and prestige. The interior had sumptuous king's apartments, decorated pillars and murals. Its upper