The national flag of Albania is a base red flag with a black two-headed eagle in the centre. It is derived from the similar seal of Gjergj Kastriot Skanderbeg, a 15th century Albanian who led the revolt against the Ottoman Empire that resulted in brief independence for Albania from 1443 to 1478. The current flag was officially adopted on April 7, 1992, but previous Albanian states such as the Kingdom and the post-war communist state had used much the same flag, with the former sporting the "helmet of Skanderbeg" above the eagle and the latter a red star with a yellow rim.