These postcards from Dresden are from my great grandfather's collection, sent from Europe in the early 1900s. Specifically, these were sent in late August 1903. Notice the postal marks on the last picture below. Not only do you see the postmark from whence the card was sent, but also the postmark of the destination address. It appears that even in 1903 a postcard from Germany took about two weeks to travel to Stockton, California. Pretty impressive. What's hard to see in these pictures is the embossing on a couple of the cards. If you enlarge the images, you may get a better sense of that.
It's very possible that many of the places featured on these cards no longer exist, due to the bombing of Dresden in 1945.