Ullal is believed to be a strong fortress of Congress for years.

It was not possible for the Muslims to storm these strong fortresses with their old weapons.

Historians have been unable to determine why such a strong fortress was built on the Don.

Show me any strong fortress as good as this which has.

The town is built on the side of a hill, the highest point being commanded by a strong fortress, not yet quite finished.

In the early 15th century it became a strong fortress, of which today the Rocca remain.

In the Social War it appears as a strong fortress, and seems to have been held by both sides at different times.

At the time of construction it was a very modern and strong fortress.

Ringed by a series of strong fortresses, true, but still only a single system.

He had a strong fortress erected against them on the Enns.