I think a few years back-at least 10 or more- Aquinas was in 6A for a short time--they were there due to their enrollment numbers. Since that time several new schools have been built across Kansas that came in or grew up to 6A: Olathe East, SM NW, Olathe South???, a couple of Blue Valley HSs, others???, forcing Aquinas down to 5A. I think Olathe North was a 6A, forced down to 5A, and grew back into a 6A.
SM Northwest was built in 1969 and I believe they have been in the top Classification since that time.
STA won the 6A State Wrestling Championship in 2005.