Please have mercy, I am but a tourist in admiration of Prague’s beautiful architecture, which I only briefly read about. Perhaps it’s a similar situation in Finland which has a troubled history with Russia, yet some of the most beautiful architecture in Helsinki is from the Russian Empire times.
Discussion
I merely commented because you used the word “holy” & “roman” in the same phrase. I’m giving Czechs a good call on the whole Constantine mistake. I agree: Prague architecture is beautiful. I recommend checking out the rare Cubist architecture & having a coffee at The House of the Black Madonna’s gorgeous museum cafe on your next visit.
Oh, look: Mother Mary & baby Jesus are black. Isn’t that curious. 
A Viennese coffee. ☕️