The University of Louisville is being forced to vacate all basketball wins from the 2011-12 season through the 2014-15 season -- including their 2013 National Championship ... and it's all over the sex party scandal.
An NCAA investigation found "a former Louisville director of basketball operations acted unethically when he committed serious violations by arranging striptease dances and sex acts for prospects, student-athletes and others, and did not cooperate with the investigation."
The punishment was initially handed down in June 2017 -- but Louisville appealed. Now, the NCAA is upholding the ruling ... which means the banner is coming down.
As we previously reported, the allegations made headlines back in 2015 when self-described madam Katina Powell claimed U of L staff paid her more than $10,000 for dances and sex services from her stable of escorts.
In her book, Powell singles out ex-Louisville staffer Andre McGee -- a graduate assistant who became director of basketball operations -- claiming he was the point man who paid Powell.
Powell claims her stable of dancers included her own daughters -- and they would perform for Louisville players at various off-campus locations from 2010 to 2014.
After the dances, Powell claims she would negotiate a separate fee for the players to have sex with the women.
Rick Pitino -- who was the coach at the time -- denied any involvement in the alleged sex plot -- and told the media, "It's a mild understatement that I'm shocked at these allegations."