The EMLL 58th Anniversary Show was a professional wrestling major show event produced by Empresa Mexicana de Lucha Libre (EMLL) that took place on September 8, 1991 in Arena Mexico, Mexico City, Mexico. This would be the last show promoted under the EMLL name as the organisation changed its name to Consejo Mundial de Lucha Libre in the winter of 1991. The show consisted of four matches, with the main event being a Lucha de Apuestas, hair vs. hair match between Konnan, Cien Caras and Perro Aguayo. The show also featured a Six-man tag team match, an eight-man match and a match where Máscara Sagrada defended the Mexican National Light Heavyweight Championship against Pirata Morgan. The event commemorated the 58th anniversary of EMLL, the oldest professional wrestling promotion in the world. The Anniversary show is EMLL's biggest show of the year, their Super Bowl event.

The 1991 Anniversary show commemorated the 58th anniversary of the Mexican professional wrestling company Empresa Mexicana de Lucha Libre (Spanish for "Mexican Wrestling Promotion"; EMLL) holding their first show on September 22, 1933 by promoter and founder Salvador Lutteroth. This would be the last Anniversary show held under the EMLL name as the company was rebranded early in 1992 to become Consejo Mundial de Lucha Libre ("World Wrestling Council"; CMLL) signal their departure from the National Wrestling Alliance. With the sales of the Jim Crockett Promotions to Ted Turner in 1988 EMLL became the oldest, still-operating wrestling promotion in the world. Over the years EMLL/CMLL has on occasion held multiple shows to celebrate their anniversary but since 1977 the company has only held one annual show, which is considered the biggest show of the year, CMLL's equivalent of WWE's WrestleMania or their Super Bowl event. CMLL has held their Anniversary show at Arena México in Mexico City, Mexico since 1956, the year the building was completed, over time Arena México earned the nickname "The Cathedral of Lucha Libre" due to it hosting most of EMLL/CMLL's major events since the building was completed. Traditionally EMLL/CMLL holds their major events on Friday Nights, replacing their regularly scheduled Super Viernes show.

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