Print the pdf: The Great Chicago Fire Coloring Page and color the picture.The Great Chicago Fire started on October 8, 1871. Legend has it that Mrs. O’Leary’s cow knocked over a lantern in the barn. The fire spread quickly and burned for 29 hours. The fire destroyed 17,450 buildings, leaving 98,500 people homeless and 250 people dead. Mrs. O’Leary’s house on DeKoven Street was spared in the fire. It was later sold and eventually demolished. The Chicago Fire Academy is now on the O’Leary property.