On 26 Feb 2018 Portugal released a set of 4 stamps and a souvenir sheet containing one stamp featuring views of the Tagus River (Rio Tejo). The fourth stamp in the set with a denomination of €0.65 shows the Lisbon Vessel Traffic Control Center in the background. I guess we could call it the Leaning Tower of Lisbon! To the left of the building we can see a red light which is the VTS Algés Pier Head Light.
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See more lighthouse stamps from Portugal here
On 8 September 2017 Portugal issued a set of four stamps plus a souvenir sheet to celebrate the selection of Cascais as the 2018 European Youth Capital. Cascais is a suburb of Lisbon and the location of Santa Marta Lighthouse which is featured on the stamp in the souvenir sheet shown below. The light serves both for general navigation and as a front range light. It dates from 1868.
Santa Marta L/H | Sc ?, Mi BL420, SG ?, Yt ?, WADP ? | 8 Sep 2017
Additional lighthouse stamps from Portugal are here