On 13 April 2026 Portugal issued a stamp and a souvenir sheet commemorating the 25th UPAEP Congress. Santa Marta Lighthouse is shown on the single stamp, the stamp imbedded in the souvenir sheet as well as being prominently displayed on the souvenir sheet itself. This lighthouse is located near the entrance to the Tagus River.
Thanks to Jaap Termes for information about this issue.
See more lighthouse stamps from Portugal here
