Barbicans were either of masonry or earth, or constructed of a simple palisade.
Valencia has battlemented walls; and its arched gate, the Puerta de Sarranos, reminds one of old English barbicans.
These barbicans had a device by which hot water or stones could be flung down upon any enemy who succeeded in passing the bridge.
Seven barbicans are set so securely that no manner of shooting from without can cause harm.
The seven barbicans we call the seven fair virtues, that suffered no vice to be in our Lady.
Some of the barbicans before the gates were in the enemy's possession, and even the Peter Gate itself.
The twelve gates, six on the left bank of the river and six on the right, are strengthened by barbicans.