I was taught that the oldest by far was Al-Qarawiyyin University in Fas, Morocco, which was founded by Fatima Al-Fihri in 859. According to Wikipedia it is the oldest degree-awarding academic institution. The University of Bologna is the oldest European-style university, as clarified by this Wikipedia article: https://en.wikipedia.org/wiki/List_of_oldest_universities_in_continuous_operation. So I believe using the term 'oldest' here is a bit unfair.
It is Al-Karouin. This is recognized as the first in Europe -- the rest depends on who wants to tell the story. Since Al-Karouin was founded by a Muslim woman, it does not always get the recognition it deserves.
technically takshilla would probably be awarde the title of oldest university since it was there in the time of the Mauryans but i believe the title in question is for oldest continously existing university
In a debate like this, it's crucial to define the terms. It might seem silly, but what's a "university" and what does "oldest" mean? Establish that, then make your case.
Fyi Bologna's University is Europe's oldest university (1088), world's oldest university is Al Qarawiyyin University (857–859) and it's located in Fez, Morocco