It was not the main reason why I was there, but Strahov Monastery has a fine picture gallery.
Initially I just went along because it rained outside and I was already there. I also had not intended to take pictures, but after I tentatively tried one and nobody stepped in to stop the copyright violation, I took a few more.
Unfortunately I didn’t buy a catalogue (I probably should have) and I also failed to take images of the artist’s names. I don’t even know how old the images are. From the style I’d say not earlier than 1870, but there is no reason why they couldn’t be much younger. I simply don’t know and Strachov’s website only mentions one Dürer, lots of Baroque and 17th to 19th century bohemian landscapes.