sentences:  The parapet of the roof was crenellated with nine wide embrasures, and the embrasures facing out across the river were constructed flush with the floor of the roof, giving the bombards plenty of room to fire.The embrasures facing away from the river, however, had sloping cills rather than open positions, and the windows in the tower facing towards the city were rectangular and relatively unprotected.The entrance to the tower itself was not fortified, as the tower was not expected to be defended from a direct attack by land.