The Sacrificial Lamb from God and John the Baptist in Civic Heraldry

O Cordeiro Sacrificial escolhido por Deus e o profeta João Baptista surgem associados em armas de municípios de vários países: Alemanha, Bélgica, Suécia, República Checa, Portugal também.

John the Baptist was a prophet who spent his time announcing that it was now the Time for the Messiah; people had consequently to repent and confess their sins as they were baptised by him on the Jordan River. Pointing at Jesus he revealed: "Ecce Agnus Dei" , a statement in Latin for: "Behold the Lamb of God" - John 1:29 ), and he added: "that takes away sin", making it clear that this lamb was not a mere sacrificial lamb, but THE Lamb that was able to renew the God-men connection.

http://www.ngw.nl/int/oos/s/s-johanns.htm