In 1160, the Emperor Frederick besieging Crema, in Italy, employed the beffroi, filling it with chosen troops. He placed crossbowmen on the upper story, in order that, shooting down upon the walls, they might clear the parapet of its defenders; while, from the lower stage, soldiers of tried boldness might fix their drawbridges on the wall, and advance to the capture of the city[243]. At this same city of Crema, in 1159, occurred an act of patriotism, admirable from the resolution which inspired it, though terrible in its consequences. The emperor advanced a Beffroi towards the beleaguered city, in front of which he placed the youthful hostages whom he had obtained from the unhappy Cremans, in hopes of thus forcing the inhabitants to a capitulation. But the citizens, regardless of all save their liberty, continued to ply their engines against the tower, though every stone that was cast forth fell in death among their children[244]. The siege of Ancona, in 1174, offers another instance of heroism in connection with the belfragium, more pleasing in its circumstances. The besieged had been successful in their endeavours to beat back the towers and scatter their occupants; but as these latter still kept up a steady discharge of missiles from a short distance, no one dared venture beyond the walls to set fire to the deserted structures. At last a widow named STAMURA, seizing a torch, advanced into the plain, and regardless of the storm of bolts and arrows that fell around her, steadily achieved the task she had undertaken, and having set the towers in flames, returned in safety to the city[245]. The siege of Ancona is further remarkable for the employment by the citizens of divers; who succeeded in capturing several of the vessels engaged in blockading the port. Taking advantage of a strong wind blowing from the sea, the divers contrived to cut the cables of seven of the Venetian ships, which then drifted helplessly ashore[246]. The _Vinea_ mentioned in a foregoing extract from Malmesbury, was called also the Cat. Thus Vegetius: "Vineas dixerunt veteres, quas nunc militari barbaricoque usu Cattos vocant[247]." Guillaume le Breton also mentions this machine and its use:-- "Huc faciunt reptare Catum, tectique sub illo Suffodiunt murum."--_Philipp._, lib. vii. While, from the Monk of Vau-de-Cernay we learn that the contrivance was of small dimensions: "Machinam quandam parvam, quæ lingua vulgari Catus dicitur, faciebat duci ad suffodiendum murum[248]." There were, however, varieties of the Cat, one of which was used to oppose the besiegers in the beffroi. Thus Radevicus: "Magnaque audacia, super muros et in suis machinis quos Cattas appellant, operiuntur, et cum (oppugnatores) admoverentur pontes, ipsi eos vel occuparent, vel dejicerent, murumque scalis ascendere nitentes vario modo deterrent[249]." And another kind was employed by the assailants in crossing the ditch[250].