what is a fortress
A fortress is a building designed to be defended, which means it was very hard for enemies to get inside. Fortification kept the people inside safe.There is little difference between a fortress and a castle. Fortresses normally have thick stone walls, thicker but less tall than in castles so artillery cannot break them. There were very small windows, without glass, so that soldiers inside could fire out through them.ortification kept the people inside safe. There is little difference between a fortress and a castle. Fortresses normally have thick stone walls, thicker but less tall than in castles so artillery cannot break them. There were very small windows, without glass, so that soldiers inside could fire out through them.