173 (CLXXIII) ebile ngwaga wa go thoma ka Labohlano, ngwaga wa bone ngwagengsome wa 170s, ngwaga wa bomasomešupa tharo ngwagengkgolo wa Ngwagakgolo 2, le ngwaga wa bolekgolo masomešupa tharo ngwagengkete wa Ngwagakete 1.