September 11, 1856
The Knights Templar commandery (S. K. T.) was organized/chartered at Janesville.
Rock CountyGrade A · 1 independent source
The evidence
“July 10, 1856, the second Odd Fellows lodge of Janesville was chartered, being Janesville City Lodge No. 90 ; and on September 11, 1856, the Masonic commandery of Knights Templar was chartered.”
1908-brown-rock-county/26-history-of-janesville.md, Vol. 2, PDF p. 40 / book p. 553
Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.
Grade A: Found on a page of one of our sources
On the printed page (Vol. 2, PDF p. 40 / book p. 553) · open the whole page