27. Knickerbocker Theater

Location: Washington, D.C.

Year of Fail: 1922

Knickerbocker theater crumbled upon hundreds of patrons in 1922, killing 98 people and injuring another 133. A record snowstorm had hit D.C. in the days before the collapse, causing over two feet of snow to pile up on the theater roof. The added weight, along with a laundry list of structural defects, caused the roof to fall onto the balcony, which then fell onto the orchestra seating, crushing and trapping hundreds. Both the architect that designed the theater and the owner of the building later committed suicide.