History A Spiritual History of the Royal Mile Printed copies £7.99 at the Christian Heritage Centre, click the image for more information. The Celtic Tour The Royal Mile has been a hotbed of spiritual and philosophical genius for centuries. Come and find out about the people who changed the world. The tours last about 90 minutes. Edinburgh City Mission A history from 1832 – 2010 By Paul James-Griffiths Use the Links below to see the different topics in this section.