1521 (MDXXI) ebile ngwaga wa go thoma ka Mokibelo, ngwaga wa bobedi ngwagengsome wa 1520s, ngwaga wa bomasomepedi tee ngwagengkgolo wa Ngwagakgolo 16, le ngwaga wa bomakgolo hlano masomepedi tee ngwagengkete wa Ngwagakete 2.