<Tr> <Td_colspan="2"> Native names Galician: Torre de Hércules Spanish: Torre de Hércules </Td> </Tr> <Tr> <Th> Location </Th> <Td> Corunna, Galicia, Spain </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 43 ° 23 ′ 9" N 8 ° 24 ′ 23" W ﻿ / ﻿ 43.38583 ° N 8.40639 ° W ﻿ / 43.38583; - 8.40639 Coordinates: 43 ° 23 ′ 9" N 8 ° 24 ′ 23" W ﻿ / ﻿ 43.38583 ° N 8.40639 ° W ﻿ / 43.38583; - 8.40639 </Td> </Tr> <Tr> <Th> Elevation </Th> <Td> 57 metres (187 ft) </Td> </Tr>

How long did it take to build the tower of hercules