I saw this story about the same chapel featured in The Davinci Code:Musicians unlock mystery melody in Scottish chapelIt talks about an architectural feature which was used to conceal a musical piece, and it was only solved recently. Not only does it make you think that medieval people were quite intelligent and cunning to hide this sort of stuff in architectural designs, but it also makes you wonder how many other riddles are hidden in other medieval works.
I think that in architecture today form has given way to function. Form necessarily entails some sense of the creative and the beautiful, and this is more conducive to hidden elaborations in details. You're simply not going to find this kind of thing in an aluminum-sided warehouse!
Yes, quantity over quality. But the traditional tension in architecture is form vs function – form leads to beauty but function leads to efficiency. Nowadays form has largely taken a back seat to function in commercial architecture and also in residential architecture. Public architecture has followed the route of commercial but religious architecture still holds to form, although not like it used to.