I don't know who came up with the idea of the urban art on fences, walls, "curtains" But it was Great! If you like art, you can have a walk all over "centro histĂ³rico" and you will find yourself with authentic pieces of urban art which makes this area more interesting. It's true to say that some parts may be dirty, but still, it is worth walking around it and enjoy the beautiful pictures created by local and foreign artists. All of them are full of colour, with authentic concepts and design, and some of them were painted on surfaces that may be hard or difficult to work on. There are graffittis as well, but there's Creativity, art, imagination and concepts in many shops and walls, which definitely makes downtown Mexico city enthralling for art lovers!!!