In 1974 I had a roommate named LaVerne (it's taken me several days to remember his name) who travelled to
Arcosanti to work as a volunteer carpenter. The
book he showed me, written by founder
Paolo Soleri, was filled with architectural drawings which stimulate the imagination and the soul.
This week I had the opportunity to visit Arcosanti with my son and his friend. We happened to be there December 21st, winter solstice. Paolo Soleri, now 86 and fit, came down from his home
(Cosanti) to be part of the ritual in which the shade line at noon was marked in the
main vault. 
Soleri also announced that he has been commissioned to build a
walking bridge for the city of Scottsdale, the proceeds of which will go towards the continued development of the
Arcosanti project. A model was displayed and a pyrotechnic event (magnification of the sun's rays onto a match occurred at noon) was the signal to drink a toast and share the joy.