Build a traditional rennaisance dome above a cathedral make it out of something transparent and light, maybe perspex?
The dome will act as a lens, which will focus the light onto a particular section of the lower half of the dome, highlighting what is written there ie: the exact time, date, season.-- Trodden, Mar 12 2003 Almost baked without the perspex. http://www.knowth.com/newgrange.htm5,000 years ago [angel, Oct 04 2004, last modified Oct 21 2004] Depending on the lattitude, you've also made a solar furnace .... the spot where the light is focussed is going to glow white hot if the lens geometry is good enough.
That would be neat ..... (+)-- 8th of 7, Mar 12 2003 You're suggesting the means for creating a burning cross, [1/8/7]?-- jurist, Mar 12 2003 Ahhh, the sweet memory of chasing ants with a mignifying glass. Picture the hand of God and the priests beneath the dome... one more way to put the deviant priest in the "hot seat" no? (+)-- X2Entendre, Mar 12 2003 Does it have to be a cathedral? Not that I have anything against religion, but these kind of buildings are already very "controversial". Your idea is too nice to be used in a place that only a very specific percentage of the population would want to visit.-- Pericles, Mar 16 2003 maya resonnance... I buy.-- sidi, Jan 28 2004 random, halfbakery