Julio María Sosa Venturini, known as Julio Sosa or "El Varón del Tango," was a prominent Uruguayan tango singer born on February 2, 1926, in Las Piedras, Uruguay. Sosa's early life was marked by financial hardship, leading him to take on various informal jobs. He began his musical career as a vocalist with Carlos Gilardoni's orchestra in La Paz, Uruguay, before moving to Montevideo to work with several renowned orchestras.

In 1949, Sosa relocated to Buenos Aires, Argentina, where he rose to fame with the Orquesta Francini-Pontier. His powerful voice and unique expressive style made him one of the most significant tango singers of the late 1950s and early 1960s. Sosa recorded numerous successful albums with orchestras led by Armando Pontier and Leopoldo Federico, among others. His repertoire included iconic songs such as "Tiempos viejos," "Cambalache," and "Nada."

Sosa's personal life included a marriage to Aída Acosta at a young age, which ended in separation. He later married Nora Ulfeldt in 1958, with whom he had a daughter, Ana María, though this marriage also ended in separation. He subsequently formed a relationship with Susana Merighi. In 1960, Sosa published a book of poetry titled "Dos horas antes del alba."

Tragically, Sosa's life was cut short on November 26, 1964, when he died in a car accident in Buenos Aires at the age of 38. His funeral drew significant public attention, and he was initially buried in Buenos Aires before being repatriated to Uruguay in 1987. Despite his untimely death, Julio Sosa's legacy endures through his recordings, which continue to resonate with tango enthusiasts worldwide.