This stamp from Niger (2016) features the historic Kõpu Lighthouse located on Hiiumaa Island in Estonia, one of the oldest continuously operating lighthouses in the world. Originally built in the 16th century, the tower served as a crucial navigation aid for ships traveling through the Baltic Sea. The stamp highlights the sturdy stone structure rising above surrounding pine trees, emphasizing its maritime heritage and architectural strength. Niger issued this stamp as part of an international lighthouse-themed series celebrating iconic coastal landmarks around the globe. For collectors, it represents a fascinating cross-country theme combining Baltic maritime history with modern African philatelic issues.