The Rural Municipality of Excelsior No. 166, Saskatchewan was originally called Waldeck No. 166, Saskatchewan and is now named Excelsior as of January 30, 1910. The original founding date of Pipestone was December 12, 1910 Up until December 31, 1967 the R.M. of Vermillion Hills No. 195 was to the south of the R.M. of Excelsior. The R.M. of Vermillion Hills No. 195 was absorbed into Morse No.