Complex sentence: During the Sena rulers, known as "Karnatadeshatagata Brahmaksatriya", in the second half of the 12th centurt the vihara started to decline for the last time, and was finally abandoned during the 13th century when the area came under Muslim occupation.
Split into simpler sentences: During the Sena rulers, known as "Karnatadeshatagata Brahmaksatriya", in the second half of the 12th century the vihara started to decline for the last time. It was finally abandoned during the 13th century, when the area came under Muslim occupation.