Holy Grail: Did you mean...?

Boniface cuts down holy oak of 'Jupiter' or Donar.

A medieval manuscript illustration depicting the Holy Roman Emperor Henry VI (r. 1191-1197 CE). (Codex Manesse, 1305-1315 CE)

A 1778 oil-on-canvas painting, Church of the Holy Cross in Warsaw, by Bernardo Bellotto. (Royal Castle, Warsaw)

Tomb of Holy Roman Emperor Frederick II (l. 1194-1250 CE) in Palermo, Sicily.

The Holy Cross Episcopal Mission, Wounded Knee, South Dakota, used as a hospital for the wounded Lakota Sioux following the Wounded Knee Massacre.

Gold coin of Holy Roman Emperor Frederick II, minted in Sicily between 1211-1250 CE. Weighs 5.2 grammes and measures 20 mm (British Museum, London)

The Holy Cross Cathedral is the main Greek Catholic church of Uzhhorod, Ukraine and is the residence of the Mukachevo bishops. The cathedral was founded in 1640. The exterior of the cathedral is done in the neoclassical...

Illustration of an enthroned Charles the Bald, Holy Roman Emperor (r. 875-877 CE), King of West Francia (r. 843–877) and Italy (r. 875–877). Copied by G.W. Hutin, 1821, from a 9th-century manuscript...

Illustration of an enthroned Lothar I, Holy Roman Emperor (r. 840-855), King of Middle Francia (Lotharingia) and Italy (r. 843-855). Copied by G.W. Hutin, 1821, from a 9th-century manuscript of the Gospels...

Guinevere is the Queen of Britain, wife of King Arthur, and lover of Sir Lancelot in the Arthurian Legends best known in their standardized form from Sir Thomas Malory's Le Morte D'Arthur (1469 CE). She first appears in Geoffrey of...