Finding his culverins and "serpents" of no avail, the Emperor dispatched some one to Innsbruck for two monster guns, known as _Weckauf_ and _Purlepaus_, which the Governor of that town, Philip von Recenau, had recently cast at the foundry. These weapons, of which drawings are extant, although the chroniclers of the time do not mention their calibre or dimensions, were of considerably larger size than "Queen Elizabeth's Pocket Pistol" at Dover, and threw balls of about 300 pounds in weight, it is said, for a distance of nearly two thousand yards. The arrival of the great guns put a very different complexion upon the siege; and after they had been brought to bear upon the castle, and had been fired,[22] it was found that their shot not only penetrated the fourteen-feet-thick walls with ease, but even the rock itself was pierced, according to some historians, to a depth of eighteen inches. Pienzenau now wished to surrender to the Emperor, provided his life was spared. But Maximilian did not forget the incident of the brooms, which bears some slight analogy to the historic "broom" incident connected with the Dutch Admiral Van Tromp, who hoisted one at his masthead in derision of the English, whom he claimed to have swept off the seas. "So he is anxious to throw away his brooms, is he?" the Emperor is said to have remarked. "He should have taken this course before. He has caused by his obstinacy the walls of this fine fortress to be so shattered, so he can do no less than give his own carcase up to a similar fate." And although great efforts were made to obtain pardon for Pienzenau and some of his more important supporters they were unsuccessful, the Emperor remaining quite obdurate. It is this execution of a brave man (whose courage and fidelity to his nation should have aroused nothing but admiration) which is a stain upon the Emperor's record. No less than five and twenty of the principal defenders were condemned to be executed. The survivors of the garrison attempted to escape secretly before the general assault, which had been arranged, took place, but they were captured. The first to be beheaded was Pienzenau; but when seventeen (some authorities say eleven) of his companions had shared the same fate, Eric, Duke of Brunswick, interceded with Maximilian so earnestly that the lives of the rest were spared. This same Eric had formerly saved the Emperor's life in battle, and possibly this fact influenced the latter towards clemency. Over the grave in which the victims of Maximilian were buried by the people of Kufstein was erected a little chapel at Ainliff on the opposite bank of the river.