Duesseldorf greeting card

In March I made two greeting cards, this one showing the skyline of Düsseldorf. It became a letter to a friend of mine who moved back to Japan. I don't have much experience with watercolor washes, but I think it turned out well I used black markers to paint the silhouette. I watched this tutorial before starting: www.youtube.com/watch?v=csuNOR…;

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