The first was the now non-existent Santa Coloma square, the second where the Nuestra Señora del Calvario School currently operates at the intersection of Urquiza and Suipacha streets; while the third was where the rectory of the Universidad Nacional del Litoral is located today in At the beginning, Unión played their home matches at Plaza Santa Coloma.

In 1926, the Government of Argentina led by Marcelo T. de Alvear granted Universidad Nacional del Litoral the land on San Jerónimo and Pellegrini, which resulted in Unión being evicted from the field.

The main match would come later, when Unión played against a team of the Asociación Amateurs de Football,[2] a dissident governing body that had been established in 1926.

The first night game in Santa Fe was played on Saturday, 12 December 1931, in a match vs Rosario Central that Unión won 3–2.

[6] On 18 December 1943, in a friendly match of the Santa Fe derby, the sector of the north stand (where the visitor supporters were) collapsed, causing several fans to end up injured and hospitalized.