In which European cities in the 10th century were there or could there be universities?

In the X century, universities were only in the main cities of the great enlightened powers: in Constantinople, Cordoba, Barcelona, Thessaloniki.

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.