In 2006, Sao Paulo, Brazil banned outdoor advertising.
In September 2006, the mayor of Sao Paulo passed a "Clean City Law," which essentially outlawed all outdoor advertising. 15,000 ads had to be removed, and store signs had to be shrunken down.
Source: newdream.org
A NY Times article from 2006 described the implications of the ban as such:
The outsized billboards and screens that dominate the skyline, promoting everything from automobiles, jeans and cellphones to banks and sex shops, will have to come down. All other forms of publicity in public spaces, like distribution of fliers, will also stop.
Photographer Tony de Marco took the following pictures in 2007:
