Coxeter called it the Witting polytope, after Alexander Witting.
•
It was discovered by Thorold Gosset, who described it in his 1900 paper as an 8-ic semi-regular figure.
•
T. Gosset: On the Regular and Semi-Regular Figures in Space of n Dimensions, Messenger of Mathematics, Macmillan, 1900
•
Thorold Gosset identified this series in 1900 as containing all regular polytope facets, containing all simplexes and orthoplexes.