This courtesy of good basketball gentleman, John Ockomon!
Timeline for THE WORLD'S LARGEST HIGH SCHOOL GYMNASIUM:
(The number following is highest paid attendance per session for an IHSAA tournament unless noted/asterisk indicates sell out)
12.30.1920 Mooresville 1220 or so
10.28.1921 Union City (advertised 1800, not likely that high)
11.23.1921 Logansport (advertised 2200)
[12.22.1921 Centerville (advertised 2500)
01.03.1922 Franklin 2240
11.29.1922 Frankfort 2400 (later 3030*)
12.08.1922 Fort Wayne South 2506
02.21.1924 Martinsville 4482 (4452*)
10.31.1924 Bedford 4492*
11.21.1924 Anderson 4498*
11.12.1926 Vincennes 4782* (later 5300*)
01.10.1928 Marion 5345* (later 5983*, 6397*)
12.07.1928 Muncie Central 7250* (oversold 7790* in 1946 sectional)
11.24.1954 Elkhart 8343*
11.21.1959 New Castle 9165* (7829 actual seats today/originally 9249)
11.??.1997 or later Anderson 8871*
11.26.2011 Seymour 8732* (8228 actual seats today)
Timeline for THE WORLD'S LARGEST HIGH SCHOOL GYMNASIUM:
(The number following is highest paid attendance per session for an IHSAA tournament unless noted/asterisk indicates sell out)
12.30.1920 Mooresville 1220 or so
10.28.1921 Union City (advertised 1800, not likely that high)
11.23.1921 Logansport (advertised 2200)
[12.22.1921 Centerville (advertised 2500)
01.03.1922 Franklin 2240
11.29.1922 Frankfort 2400 (later 3030*)
12.08.1922 Fort Wayne South 2506
02.21.1924 Martinsville 4482 (4452*)
10.31.1924 Bedford 4492*
11.21.1924 Anderson 4498*
11.12.1926 Vincennes 4782* (later 5300*)
01.10.1928 Marion 5345* (later 5983*, 6397*)
12.07.1928 Muncie Central 7250* (oversold 7790* in 1946 sectional)
11.24.1954 Elkhart 8343*
11.21.1959 New Castle 9165* (7829 actual seats today/originally 9249)
11.??.1997 or later Anderson 8871*
11.26.2011 Seymour 8732* (8228 actual seats today)