Holy grail: Did you mean...?

Painted illustration of the quaternion eagle of the Holy Roman Empire, created by Jost de Negker in 1510 CE. It depicts the double-headed eagle crest of the Holy Roman Empire (adopted 1433 CE) with the banners of its towns. It became widely...

This infographic showcases the Electors of the Holy Roman Empire - a group of seven powerful princes and archbishops who held the exclusive right to elect the emperor. The Holy Roman Empire, a fragmented but enduring Central European realm...

The Byzantine Church of the Holy Apostles, Athens. Built c. 1000, it is typical of the Byzantine church model copied everywhere across the Byzantine Empire.

A map illustrating the geography and history of Holy Island, also known as Lindisfarne. A tidal island off the northeast coast of England in Northumberland, it holds significant historical and religious importance due to its early Christian...

The Church of the Holy Sepulchre, Jerusalem. Completed in July 1149 when the city was the capital of the Kingdom of Jerusalem, the church replaced a smaller version on the site considered to be the place of Jesus Christ's crucifixion and...

Portrait of Charles V, Holy Roman Emperor (1500-1558), line engraving on paper by Barthel Berham. Scottish National Portrait Gallery, Edinburgh.

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

Illustration of the Holy Roman Emperor Charles V (r. 1519-1556 CE) and Ferdinand I. The illustration depicts the Habsburg brothers Charles V (left) sitting by the imperial coat of arms, while Ferdinand (right) is flanked by the Habsburg coat...

Woodcut portrait of Henry IV, Holy Roman Emperor (r. 1084-1105) by Christoffel Jegher, c. 1631-1633. The British Museum, London.

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)