Saint Vitus Saints
If you've been to Prague, most likely you've been to St. Vitus Cathedral (I mean, it's rated #1 of 1,220 things to do in Prague on Trip Advisor for a reason). It's a prominent historical and religious site worth seeing for the art, majesty, culture, and experience.
Here is a photo of some of the stained glass (though it's not by a long shot the most popular piece of stained glass art in the place; that spot is probably reserved for the masterwork of Mucha which you can look at here).
When I was in Prague, I tried to take the best photo that I could of some of the stained glass.
Somebody on Wikipedia took a much better photo.
Each of these represents an important figure in Catholic iconography and culture. It is worth knowing a little bit more about each of them. Here's a place you might like to start about Svatý František z Assisi, Svatý Petr, and Svatá Alžbětá. If you are using the Chrome browser, you can right click and these Czech Wikipedia articles will give you a translation to English. You'll probably be interested to note that they are not exactly the same as the English articles; if you have Czech ancestors, there's no doubt that you have at least one ancestor named František. Why not learn more about the history of the name?
In Czech, the abbreviation for Saint is not "St." but "Sv." - which is very important general knowledge to have when reading the land records!