Issued by Poland in 1966, this striking 60 groszy stamp commemorates the Tysiąclecie Państwa Polskiego—the Millennium of the Polish State. The design features the bold red-and-white Polish national flag set against a rich golden background, symbolizing national pride and a thousand years of Polish history dating back to 966. Designed by F. Winiarski and printed by PWPW, the stamp reflects the strong patriotic themes used during the millennium celebrations. Its clean, symbolic design makes it a notable commemorative piece for collectors interested in European history and national anniversary issues.