1623 (MDCXXIII) ebile ngwaga wa go thoma ka Sontaga, ngwaga wa bone ngwagengsome wa 1620s, ngwaga wa bomasomepedi tharo ngwagengkgolo wa Ngwagakgolo 17, le ngwaga wa bomakgolo tshela masomepedi tharo ngwagengkete wa Ngwagakete 2.