Program:
– 1 to 10: Francesinha Festival
– 12 to 24: Seafood Festival
– 26 to 31: Piglet Festival

Where: 
Centro de Congressos da Alfândega do Porto
Rua Nova da Alfândega, 4050-430 Porto
GPS: 41.1426554, -8.6204359

More info: Facebook of the event

Picture taken from here.