Torre de Belém or Belém Tower, officially the Tower of Saint Vincent is a 16th-century fortification located in Lisbon that served as a point of embarkation and disembarkation for Portuguese explorers and as a ceremonial gateway to Lisbon. 

Since 1983, the tower has been a UNESCO World Heritage Site, along with the Jerónimos Monastery. It is often portrayed as a symbol of Europe's Age of Discoveries and as a metonym for Portugal or Lisbon, given its landmark status.

- Wikipedia