The Warsaw radio collapsed in August 1991. Before this, it was the tallest structure in the world. The mast was designed by Jan Polak and stood at 2,120 feet tall.
It was completed in 1974 in Poland and was used by the Warsaw Radio-Television for longwave radio broadcasting.
On August 8, 1991, an error was made while changing the guy-wires on the highest stock and the mast collapsed. The mast bent and then snapped about in half. An investigation determined that blame lay with the company that built the mast, Mostostal Zabrze.
The construction coordinator and the chief of the division that built the mast were sentenced to 2.5 years and 2 years in prison respectively.