This is really interesting, thank you Mara. The Three Kings are one of my favourite parts of the Christmas story and I often wondered what happened to them. I see (from another Wikipedia site) there is an annual medieval costume parade in their honour in Milan on January 6th - that would be interesting to see.
Very interesting POV, Mara, makes it very mysterious! What I also found interesting in the link that you have supplied, is the Magi-link with Cologne's magnificent cathedral, and the similarity in style between this church and Santa Maria delle Grazie, home of L'Ultima Cena.
Very clever, and a fav. I particularly like the central positioning of the tower. I think that central positioning of subjects that have strong symmetry works so well, I belive it is starting to be in vogue a little with those brave enough to ignore the thirds rule.
For further reference see link : http://en.m.wikipedia.org/wiki/Basilica_of_Sant'Eustorgio