Coat of Arms of Dom Pedro da Costa

These are the coat of arms of Pedro da Costa (Bishop of Porto between 1507 and 1535) from a house located in Rua das Flores in Porto, which adopted the wheel with razors as its heraldic symbol, one of the attributes of the martyrdom of St. Catherine of Alexandria. On Rua das Flores, originally called Rua de Santa Catarina das Flores, you can still see the knife wheel on the facades of some houses, which identified the residences that paid fees to Mitra.