A proposal by the Spanish viceroy Francisco de Toledo, Count of Oropesa set about the initial construction of the first mint.

In 1572 the foundations near the Royal Palaces in the Plaza del Regozijo under the auspices of the architect Jerónimo Leto, who finished the work in three years.

Following a scandal and the resulting investigation, plans to reform the old factory were abandoned and a new building was erected in the neighbouring plaza del Gato.

Days before -in Buenos Aires- the Assembly of the Year XIII created a national currency for the United Provinces of the Río de la Plata, which had been approved on April 13, 1813.

Little after a conflict that stretched 15 years with the support of Simón Bolívar and Antonio José de Sucre, the administrative organization and monetary unit was established, albeit with numerous difficulties.