WARSAW, May 3 (Xinhua) -- Poland celebrated Constitution Day on Saturday with official ceremonies in Warsaw, marking 234 years since the adoption of the May 3 Constitution, Europe's first modern constitution.

Events took place at Castle Square, where President Andrzej Duda delivered a keynote speech alongside Prime Minister Donald Tusk and other top officials.

Adopted by the Polish-Lithuanian Commonwealth, the May 3 Constitution of 1791 remains a key symbol of national identity, despite its brief implementation.

The day is part of Poland's "Majowka" holiday stretch, which includes Labor Day and Flag Day, when red-and-white flags adorn streets and homes nationwide. ■