Moat and walls of Imperial Palace, Tokyo, Honshu, Japan, Asia

Wooden covered walkways in the Hue Imperial City (Citadel), UNESCO World Heritage Site, Vietnam, Indochina, Southeast Asia, Asia

The Imperial Palace in central Tokyo, Japan, Asia

Imperial Palace, Tokyo, Japan, Asia

Spanish Riding School, in Hofburg palace, Vienna, Austria

Kyoto, Japan

Kyoto, Japan

Sculptures on roof of Nationalbibliothek national library, Josefsplatz, Alte Hofburg, Vienna, Austria

New Burg section, Hofburg Imperial Palace, Vienna, Austria, Europe

View of part of the ruins of the imperial palace of Emperor Frederick I Barbarossa, Kaiserswerth, Düsseldorf, North Rhine-Westphalia, Germany, built in the Middle Ages around 1184 on the present banks of the Rhine

Michaelertrakt at Michaelerplatz Square, Hofburg Imperial Palace, Vienna, Austria, Europe

Sculptures with the imperial crown and coat of arms on the roof of the Hofburg Imperial Palace, Vienna, Austria, Europe

Imperial Crown Convertible, built in 1961, USA, Classic-Gala, Concours d'Elegance in the Baroque castle gardens, Schwetzingen, Baden-Wuerttemberg, Germany, Europe

Hall of the mandarins Ta Vu and Huu Vu, reflection in bronze urn, Hoang Thanh Imperial Palace, Forbidden City, Hue, UNESCO World Heritage Site, Vietnam, Asia

Morning gate, Ngo Mon Gate, main entrance to the Imperial Palace Hoang Thanh, Forbidden City, Hue, UNESCO World Heritage Site, Vietnam, Asia

Hien Nhon East Gate at the Citadel, Imperial Palace Hoang Thanh, Forbidden City, Hue, UNESCO World Heritage Site, Vietnam, Asia

Michaelertrakt at Michaelerplatz Square, Hofburg Imperial Palace, Vienna, Austria, Europe

Amalienburg wing of the Hofburg Imperial Palace, Vienna, Austria, Europe

Portal, Heroes' Square, Hofburg Imperial Palace, Vienna, Austria, Europe

Statue Joseph II. in front of Hofburg Imperial Palace, Josefsplatz, Vienna, Austria, Europe

Horse-drawn carriage, Hofburg Imperial Palace, Vienna, Austria, Europe

Pavilion, Hoang Thanh Imperial Palace, Forbidden City, Hue, UNESCO World Heritage Site, Vietnam, Asia