Coat of arms in Udine

Coat of arms in Udine, Italy

Amazing emblem seen in the streets of Udine. Any ideas who is the owner of this coat of arms?

Manhole cover in Rottenmann

Manhole cover in Rottenmann, Austria

While watching a classic car ralley in Rottenmann I came across this manhole cover showing the emblem of the city.

Manhole cover in Hanover

Manhole cover in Hannover, Germany

A manhole cover seen in Hannover, Germany. I know the coat of arms of Hannover which is in the center of the emblem but what about the two lions and the helmet? Do you know the meaning of this coat of arms?