Question

king harshvardhan establised a large center of knowledge which was called as bhadra vihar at

Answer 1

Bhadra vihar means , where Bhadra lives. 
Bhadra was the  the principal of Nalanda University. 
as Bhadra was the principal of Nalanda University , he was staying at Nalanda.
 
So King Harshvardhan establised a large center of knowledge  at Nalanda only.

Nalanda is  located about 95 kilometres  southeast of Patna. It was an important center of learning from 5th century to 1200 AD

Hope it has helped

Answer 2

$\textbf{Nalanda}$
________________

● King Harsh vardhan established a large centre of knowledge which was called as $\textbf{bhadra vihar}$ at $\textbf{Nalanda}$.

● The place where bhadra used to lived known as $\textbf{bhadra vihar}$.

● Nalanda university was the centre of knowledge during the time of king $\textbf{Harsh Vardhan}$.

● Nalanda is located about 55 miles south east of $\textbf{Patna}$ in $\textbf{Bihar}$.

● Nalanda university was destroyed by Turkish leader $\textbf{Bakhtiyar khilji}$ in 1193.

Thanks !!

$\textbf{be brainly}$