(79 years)(founded as Club Atlético Municipal de Medellín)
(79 years)(registered by public deed in the first notary office of Medellín, considered as official foundation date)
→ (75 years)(renamed to Club Atlético Nacional by Luis Alberto Villegas, former president of the Liga Antioqueña de Fútbol, reflecting the club's policy of fielding only Colombian-born players)