Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
https://aquicoral.blogspot.com/2013/08/virgen-de-zumaia-zumaia-birjinaren.html
https://porsolea.com/el-flysch-de-zumaia-acantilados-de-espana/olympus-digital-camera-3/
http://www.gcatholic.org/churches/europe-south/104368.htm