1821 (MDCCCXXI) ebile ngwaga wa go thoma ka Mošupologo, ngwaga wa bobedi ngwagengsome wa 1820s, ngwaga wa bomasomepedi tee ngwagengkgolo wa Ngwagakgolo 19, le ngwaga wa bomakgolo seswai masomepedi tee ngwagengkete wa Ngwagakete 2.