Based on the premise "Despite Viking raids, a great fire at the end of the 14th century, and long years of neglect, many of the original buildings still the 11th-century round tower (more than 30 m/100 ft high and 15 m/50 ft around the ba se), a ninth-century barrel-vaulted church known as St.", can we conclude the hypothesis "The VIkings never raided them." is true?
no