Falling of the Walls of Jericho
"And it came to pass on the seventh day, that they rose early at the dawning of the day, and compassed the city after the same manner seven times: only on the day they compassed the city seven times. And it came to pass at the seventh time, when the priests blew the trumpets, Joshua said unto the people, Shout; for Jehovah hath given you the city. And the city shall be devoted, even it and all that is therein, to Jehovah: only Rahab the harlot shall live, she and all that are with her in the house, because she hid the messengers that we sent. But as for you, only keep yourselves from the devoted thing, lest when ye have devoted it, ye take of the devoted thing; so would ye make the camp of Israel accursed, and trouble it. But all the silver, and gold, and vessels of brass and iron, are holy unto Jehovah: they shall come into the treasury of Jehovah. So the people shouted, and the priests blew the trumpets; and it came to pass, when the people heard the sound of the trumpet, that the people shouted with a great shout, and the wall fell down flat, so that the people went up into the city, every man straight before him, and they took the city." Joshua 6:15-20 ASV
Illustration of the walls of Jericho falling as the Israelites surround the city. The ark of the covenant and priests blowing trumpets are seen on the left side of the picture.