Why it's the capital
Thanks to its central position, Lisbon replaced Coimbra as Portugal's capital in 1255. Later, most Portuguese voyages of the Age of Discovery set out from here, including Vasco da Gama's journey to India in 1498.
Capital of PortugalLisbon lies on the Atlantic side of the Iberian Peninsula, at the mouth of the Tagus river, along the river's northern shore.
Thanks to its central position, Lisbon replaced Coimbra as Portugal's capital in 1255. Later, most Portuguese voyages of the Age of Discovery set out from here, including Vasco da Gama's journey to India in 1498.
Lisbon is the westernmost capital of mainland Europe: aim at Portugal's Atlantic coast, where the Tagus river reaches the ocean.
Sources: Wikipedia: Lisbon