Western Wall

Now as soon as the army had no more people to slay or to plunder, because there remained none to be the objects of their fury (for they would not have spared any, had there remained any other work to be done), Caesar gave orders that they should now demolish the entire city and Temple, but should leave as many of the towers standing as were of the greatest eminence; that is, Phasaelus, and Hippicus, and Mariamne; and so much of the wall as enclosed the city on the west side. This wall was spared, in order to afford a camp for such as were to lie in garrison [in the Upper City , as were the towers three forts also spared, in order to demonstrate to posterity what kind of city it was, and how well fortified, which the Roman valor had subdued; but for all the rest of the wall Jerusalem , it was so thoroughly laid even with the ground by those that dug it up to the foundation, that there was left nothing to make those that came thither believe it [Jerusalem] had ever been inhabited. This was the end which Jerusalem came to by the madness of those that were for innovations; a city otherwise of great magnificence, and of mighty fame among all mankind.

And truly, the very view itself was a melancholy thing; for those places which were adorned with trees and pleasant gardens, were now become desolate country every way, and its trees were all cut down. Nor could any foreigner that had formerly seen Judaea and the most beautiful suburbs of the city, and now saw it as a desert, but lament and mourn sadly at so great a change. For the war had laid all signs of beauty quite waste. Nor had anyone who had known the place before, had come on a sudden to it now, would he have known it again. But though he foreigner were at the city itself, yet would he have inquired for it.

...the Romans set fire to the extreme parts of the city suburbs and burnt them down, and entirely demolished [Jerusalem's] walls.

When entirely demolished the rest of the city, and overthrew its walls, he left [three towers as a monument of his good fortune, which had proved destructive power of his auxiliaries, and enabled him to take what could not otherwise have been taken by him.

And where is now that great city, the metropolis of the Jewish nation, which was fortified by so many walls round about, which had so many fortresses and large towers to defend it, which could hardly contain the instruments prepared for the war, and which had so many ten thousands of men to fight for it? Where is this city that was believed to have God himself inhabiting therein? it is now demolished to the very foundations, and hath nothing left but that monument of it preserved, I mean the camp of those that hath destroyed it, which still dwells upon its ruins; some unfortunate old men also lie ashes upon the Temple, and a few women are there preserved alive by the enemy, for our bitter shame and reproach.... I cannot but wish that we had all died before we had seen that holy city demolished by the hands of our enemies, or the foundations of our Holy Temple dug up, after so profane a manner.