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Conrad the Red

(Encyclopedia)Conrad the Red, d. 955, duke of Lotharingia (Lorraine; 944–53). A Franconian adherent of the German king Otto I (later Holy Roman emperor), he was made duke of Lotharingia and married Otto's daughte...

Constantine, Roman general

(Encyclopedia)Constantine, d. 411, Roman general. He was proclaimed emperor by the Roman troops in Britain in 407 and led a revolt in Gaul and Spain against the Western emperor Honorius. He conquered part of Gaul a...

Otto, Frei Paul

(Encyclopedia)Otto, Frei Paul ôˈtō [key], 1925–2015, German architect. Most notable for his tensile and pneumatic structures, Otto was among the first major architects to experiment with lightweight design. H...

Rank, Otto

(Encyclopedia)Rank, Otto ôtˈō rängk [key], 1884–1937, Austrian psychoanalyst; one of Sigmund Freud's first and most valued pupils. He early employed Freudian techniques to clarify the underlying significance ...

Rulers of the Roman Empire (table)

(Encyclopedia)Rulers of the Roman Empire(including dates of reign) Emperors in the East(until the fall of Rome; see table entitled Rulers of the Byzantine Empireat Byzantine Empire for later emperors) Empero...

Otto, Nikolaus August

(Encyclopedia)Otto, Nikolaus August nēˈkōlous ouˈgo͝ost ôˈtō [key], 1832–91, German engineer. He was coinventor (1867) of an internal-combustion engine, and he devised (1876) the four-stroke Otto cycle, w...

Frederick I, elector of Brandenburg

(Encyclopedia)Frederick I, 1371–1440, elector of Brandenburg (1415–40), first of the Hohenzollerns (see Hohenzollern, family) to rule Brandenburg. As Frederick VI, burgrave of Nuremburg, he served under King Si...

Lothair, French king

(Encyclopedia)Lothair, 941–86, French king (954–86), son and successor of King Louis IV. During the early part of his reign he was dominated by Hugh the Great. Even after Hugh's death he was involved in conflic...

Frederick I, king of Prussia

(Encyclopedia)Frederick I, 1657–1713, first king of Prussia (1701–13), elector of Brandenburg (1688–1713) as Frederick III. He succeeded his father, Frederick William the Great Elector, in Brandenburg. Throug...

Dix, Otto

(Encyclopedia)Dix, Otto, 1891–1969, German painter and draftsman. Dix fought in World War I and returned to Düsseldorf haunted by the horrors he had witnessed. In 1924 he published War, a series of 50 etchings, ...