Marco Manuel Avellaneda was the governor of Tucumán Province in Argentina, and father of the Argentine President Nicolás Avellaneda.
He was executed after an unsuccessful revolt against the Federal government, and his head was displayed on a pike.
Wikipedia https://en.wikipedia.org/wiki/Marco_Avellaneda
Address 1764 Calle Junin, Ciudad Autónoma de Buenos Aires C1113AAT, Argentina
Coordinates -34°35'17.9" N -58°23'35.564" E