I've found this sticky in my city, near Barcelona, Catalonia.
Anybody could help me identify the top banner? I'm not sure if the sun has changed some colors, and some fellow local anti-fascists have suggested that it could be the Palestinian flag. But I'm not sure, and it's the first time that I've found it.
Looks like a sunbleached Palestinian flag, there is a very faint yellowish-pink area that was probably red to begin with. The blueish parts faded from green.
Thanks comrade.