Cambodia has been through a lot of political regimes during the 20th century. As a consequence, they have also been through a lot of flags, before finally adopting the current one, 30 years ago today.

The presence of Angkor Wat has been remarkably stable across the various flags. It also makes the Cambodian flag on of the only four state flags to feature a building. The other are the flags of Portugal, San Marino and Spain....