List the famous contemporaries of Pope Sylvester II.

Byzantine Emperor Vasily II of the Bulgar fighter and Tsar of Bulgaria Samuil; Vladimir of Kiev and the King of Poland Boleslav I the Brave; King of Hungary Istvan I Saint and King of Norway Olaf I Saint; Caliph Hakim in Egypt and Afghan Sultan Mahmud Ghaznevi; scientists Avicenna and Biruni, poet Ferdowsi.

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.