Church Of Our Lady of Tyn

It's the Gothic just off Old Town Square, built in the 14th or so, whose spires are visible all over Prague. It became Hussite as long as they held out against the Catholics, then over-the-top Baroque when the Hapsburgs re-imposed Catholicism. No fotos are permitted, although lots of people were snapping away. I didn't, mainly because it is a visual nightmare of sparse Gothic buried under layers of Baroque gold and silver. There's a good article and photo gallery on Wikipedia. Oh yes, Tycho Brahe, who argued against the Aristotelian "incorruptible and immutable" nature of the heavens, is buried there.