This is a legal graffiti wall in Faro. Provided by users of legal-walls.net. 
 Is this wall really legal? 
 View <a href="https://www.legal-walls.net/wall/2356?utm_source=api" target="_blank">the comments</a> and <a href="https://medium.com/legal-walls/how-to-assess-the-legality-of-a-graffiti-hall-of-fame-a27884696f34">check this post</a> for tips. 
 If it's public property, you should get in touch with local authorities. For private property, just contact the owner. 
 Where does this information come from? 
 Legal-walls is a crowd-sourced community. If you believe the wall is no longer there, or not legal, leave a comment by clicking the link below.

Old Abandoned Factory

This is a legal graffiti wall in Aveiro. Provided by users of legal-walls.net. 
 Is this wall really legal? 
 View <a href="https://www.legal-walls.net/wall/2547?utm_source=api" target="_blank">the comments</a> and <a href="https://medium.com/legal-walls/how-to-assess-the-legality-of-a-graffiti-hall-of-fame-a27884696f34">check this post</a> for tips. 
 If it's public property, you should get in touch with local authorities. For private property, just contact the owner. 
 Where does this information come from? 
 Legal-walls is a crowd-sourced community. If you believe the wall is no longer there, or not legal, leave a comment by clicking the link below.

Hall Of Fame Esgueira

This is a legal graffiti wall in Portimão. Provided by users of legal-walls.net. 
 Is this wall really legal? 
 View <a href="https://www.legal-walls.net/wall/339?utm_source=api" target="_blank">the comments</a> and <a href="https://medium.com/legal-walls/how-to-assess-the-legality-of-a-graffiti-hall-of-fame-a27884696f34">check this post</a> for tips. 
 If it's public property, you should get in touch with local authorities. For private property, just contact the owner. 
 Where does this information come from? 
 Legal-walls is a crowd-sourced community. If you believe the wall is no longer there, or not legal, leave a comment by clicking the link below.

Daan Botlek

"De motu corporum ex percussione"