[Archelaos]

This Wikipedia list has a lot more St. Michael's churches:

https://en.wikipedia.org/wiki/St._Michael%27s_Church

Around 150 in Europe alone.

For the next hackaton: Write a programme to find all possible approximately straight lines between any 7 of these churches.

[mikhailfranco]

There really are many more. I know of 3 in a small area of Somerset not on the list, but 2 of them are ruined, and hence not currently dedicated:

https://en.wikipedia.org/wiki/Church_of_St_Michael_and_All_A...

https://en.wikipedia.org/wiki/Burrow_Mump

https://en.wikipedia.org/wiki/Glastonbury_Tor

Churches were often dedicated to St. Michael when they were built over pagan sanctuaries, because St. Michael could fight the old heathen devil. Another example would be in Brent Knoll, next to the iron age hill fort:

https://en.wikipedia.org/wiki/St_Michael%27s_Church,_Brent_K...

https://en.wikipedia.org/wiki/Brent_Knoll_Camp

That is undoubtedly the case for both St. Michael's Mount (Cornwall) and Mont Saint Michel (Normandy) in the list of 7. They are both perfect defensive sites, on islands close to the shore, but accessible by causeways at low tide, and hence certainly occupied from prehistoric times.

https://en.wikipedia.org/wiki/St_Michael%27s_Mount

https://en.wikipedia.org/wiki/Mont-Saint-Michel

[mikhailfranco]

P.S. I added these to Wikipedia, but note there is a whole separate page for Michael with All his Angels:

https://en.wikipedia.org/wiki/St_Michael_and_All_Angels_Chur...

[acjohnson55]

Also, allow the map projection to vary, to produce lines of different curvatures.