Marca Geronis
The ''Marca Geronis'' (march of Gero) was a vast super-march in the middle of the tenth century. It was created probably for Thietmar (in the 920s) and passed to his two sons consecutively: Siegfried and Gero. On Gero's death in 965 it was divided into five (sometimes counted as six) different marches: the Nordmark, the Ostmark, Meissen, Zeitz, and Merseburg. Because Siegfried's and Gero's comital seat was Merseburg, it has sometimes been called the March of Merseburg. However, there is also a Merseburger march which grew out of it after 965. Because the central diocese in his march was Magdeburg, sometimes it is called the March of Magdeburg (''Magdeburger Mark''). Other historians prefer to call it the (Saxon) Eastern March or Ostmark, but these terms are also applied to another march which grew out of it in 965. Because the ''Marca Geronis'' was created simultaneously with the March of Billung to the north, it is sometimes said to be the southern half of the Ostmark. Some his ...
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HRR 10Jh
HRR may refer to: * Haploid-relative-risk, a method for determining gene allele association to a disease * Harrington railway station, in England * Henley Royal Regatta * Healy River Airport, in Alaska, United States * Heart rate reserve *Homologous recombination repair, a major DNA repair pathway that mainly acts on double-strand breaks and interstrand crosslinks * Hirzebruch–Riemann–Roch theorem * ''Historicorum Romanorum reliquiae'', a collection of ancient fragmentary Latin history-works * ''The History of Rock and Roll'', a radio documentary * Holy Roman Empire (German: ') * Hondo Railway, an American railway * Horuru language, spoken in Indonesia {{disambiguation ...
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