Art is everywhere in Philadelphia, from statues in public parks to the portrait gallery in the Second National Bank Building. Large bare walls on the sides of buildings become a huge canvas for murals. Apparently there are a lot of them in Philadelphia, because there's even a special guided tour just to see the murals. We saw a few on our own as we were walking around.
Most murals are painted on the sides of buildings. I can't even begin to think of what it takes to paint something that size and keep it at the correct scale and proportions. Imagine our amazement when we saw this on the side of the building. At first it appeared to be a painted mural, but when we got closer we realized it was actually a mural done in tiny mosiac tiles, millions of them. The building was several stories tall and probably 100 feet deep. The second photo is a close-up of the mural, that section at the lower right under the young man's hand.
Not everyone has the opportunity to visit all of the galleries and museums, so this art is outside in their own neighborhood, for everyone to share.