"Přag" sounds ridiculously funny to a Czech speaker, I'm glad we don't call it that! :D Great quiz btw, thanks for making a quiz about my country's capital. I liked the varied selection of questions which didn't just revolve around the most obvious answers!
I was very confused by the question about the river as I always knew it by the name Moldau. I see now it is called Vltava in English (and Czech). Apparently those names have the same origin, but sound very different.
Astronomical clocks already typically display zodiacal signs.
Not bad for someone like me who knows jack-squat about Czechia.