On 23 Sept 2016 Portugal issued a set of five stamps dedicated to Bridges and Engineering Structures. One of these stamps commemorates the 500th anniversary of the Tower of Belém. This stamp is very similar to to one issued on 1 July 2015 (see it here).
The second stamp shown below was issued on 10 Oct 2o16 and also features the Tower of Belém and is part of a set of four stamps commemorating the 500th Anniversary of Postal Service in Portugal.
View more lighthouse stamps from Portugal here