Strategically built on the north bank of the Tagus River between 1514 and 1520 , for the defense bar in Lisbon , is one of the jewels of the architecture of King Manuel I. In the ensemble we can separate two distinct bodies of military architecture models : the donjon and the medieval fortress that modern , with two levels for artillery shell , allowing a greater range of fire , grazing and ricochet over the water . The Tower of Belem is a cultural reference , a symbol of the specificity of the country passing through the privileged dialogue with other cultures and civilizations . Guardian of our individuality and universality , he saw that status was confirmed when , in 1983 , was classified by UNESCO as "Cultural Heritage of all Humanity . " http://www.torrebelem.pt/ Photos: Celso Gonçalves Roc2c