Hello
There are a unique kind of gothic style only in Portugal. Is the Manuelino, because sorted in the time of king Manuel I - 16th century. The style has many maritime influences, because it was in the time of the portuguese sea discoveries.
In Lisbon the most important monuments in this style are in Balém area, near the river Tagus.
Mosteiro dos Jerónimos, an old monastery, where now works as church, museum of antropology and navy museum.
Torre de Belém were used to defend Lisbon from the enemies ships.
Because they are unique and beautiful, i think it would be nice in the game
http://en.wikipedia.org/wiki/Mosteiro_dos_jer%C3%B3nimos
http://en.wikipedia.org/wiki/Torre_de_Bel%C3%A9m