Excerpts from Books and Wikipedia
"Between the 7th and 11th century, Kannauj became the center of the Tripartite struggle, that lasted for more than two centuries between the Pala Empire, Rashtrakuta Empire, and Gurjara-Pratihara Empire. The city later came under the Gahadavala dynasty, under the rule of Govindachandra, the city reached "unprecedented glory". However, the "glory of Imperial Kannauj" ended with conquests of the Delhi Sultanate." [Wikipedia]