On 7 October 2016 Latvijas Pasts issued the latest in their annual series commemorating Latvian Lighthouses. This issue features Ovīšu Lighthouse (Cape Ovīšu Lighthouse). This is the oldest active lighthouse in Latvia and is located on the entrance of the Irbe strait between Latvia and Estonia. The second image shows the stamps first day cover with postmark.
Ovīšu Lighthouse | Scott ?, Mi ?, SG ?, WADP ? | 07 Oct 2016
View other lighthouse stamps from Latvia here