
 Marozia, born Maria and also known as Mariuccia or Mariozza ({circa} 890 – 937), was a Roman noblewoman who was the alleged mistress of Pope Sergius III and was given the unprecedented titles senatrix (`senatoress`) and patricia of Rome by Pope John X. Edward Gibbon wrote of her that the `influence of two sister prostitutes, Marozia and Theod......
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http://en.wikipedia.org/wiki/Marozia

(from the article `John XI`) He was the son of Marozia (dominant lady of the Roman Crescentii family) perhaps by her reputed lover, Pope Sergius III. John was consecrated in ... ...of rights and lands after 900. But power was slipping away. Tuscany and Spoleto were semiautonomous under their marquesses; so was the Rome of ... ...as H...
Found on 
http://www.britannica.com/eb/a-z/m/39
  No exact match found.