^"SAINT HRIP'SIME". California State University – Armenian Studies Program. 10 September 2012. Archived from
the original on 10 September 2012. Retrieved 4 March 2018.
^"Kairouan". whc.unesco.org. Retrieved 5 March 2018.
^Clapham, Alfred (1930). English Romanesque Architecture, 1, Before the Conquest. Oxford University Press. p. 33. perhaps the most imposing architectural memorial of the 7th century yet surviving north of the Alps.