Matt Simmons, WPXI.com

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Pittsburghers watched 23.6 inches of snow pile up before their eyes, in what remains the greatest one-day snowfall on record.

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On this day: Feb. 11, 2001, Three Rivers Stadium, former home to the Pittsburgh Steelers and Pirates, was imploded.

Mario Lemieux retired as a professional hockey player at the age of 40, on Jan. 24, 2006. Lemieux mounted a successful comeback as an owner-player in the National Hockey League in 2000, after three years in retirement.

Joseph Barker was elected to the Mayor’s office on Jan. 8, 1850, while he sat in the county jail after his anti-Catholic preaching was declared a public nuisance.

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On Jan. 4, 1988, Sophie Masloff became the first woman to serve as president of Pittsburgh’s city council. Masloff would go on to become one of the most well-liked mayors in the city’s history.

Dr. Albert Einstein delivered his first major speech in the United States at Carnegie Institute of Technology on Dec. 28, 1934. The world-renowned physicist’s lecture was the highlight of the four-day American Association for the Advancement of Science conference.

One of the most iconic items in sports today, the Terrible Towel was born on Dec. 27, 1975 by broadcaster Myron Cope for a 1975 Steelers playoff game against the Baltimore Colts.

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The Rink at PPG Place first opened on Dec. 18, 2001. For the 2015-16 season, the rink was further expanded by 25%. It is 67% larger than the famous Rockefeller Center ice rink in New York City and about two-thirds the size of a standard National Hockey League Rink.

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Steelers defeat Redskins 24-3 in final game at Three Rivers Stadium on December 16, 2000.

Mario Lemieux became the first owner-player on his team in National Hockey League history when he announced his return to the game on Dec. 11, 2000.