List the famous contemporaries of Gregory VII.

William I the Conqueror {Norman and English); emperors: Henry IV (Germany), Roman IV Diogenes (Byzantium); Kings: Henry I (France), Harold of Saxon (England) and Harald Hardrada (Norway); Prince Yaroslav the Wise; Seljuk sultans Alp Arslan and Melik Shah.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.