Tower of Belém
The Tower of Belém in Lisbon, Portugal was built to commemorate Vasco da Gama's expedition. It is a reminder of the great maritime discoveries that laid the foundations of the modern world and one of the most beautiful Renaissance monuments in Portugal
Although I have seen this famous landmark a couple of times, the only photo I could get hold of right now is during the time of its restoration during the years 1997-1998.
The tower has served various purposes since inception, from a customs post, telegraph office and even lighthouse. It also became a political prison, with its storerooms transformed into dungeons.
At present, it is cultural icon, a symbol of Portugal, and it provides a valuable glimpse into the country's relations with other cultures and civilisations.
In 1983 UNESCO declared the Tower of Belém as "World Heritage Cultural Site".