Bangor Cathedral (Welsh: Eglwys Gadeiriol Bangor) is a cathedral in Bangor, Gwynedd, Wales. It is dedicated to its founder, Saint Deiniol. The site of the present building of Bangor Cathedral has been in use as a place of Christian worship since the sixth century. The cathedral was built on a low-lying and inconspicuous site, possibly so as not to attract the attention of Viking raiders from the sea in ancient times. The Gothic style building on the hill is part of Bangor University.