Juan de Canaveris
He had achieved a high social status in the Viceroyalty of the Río de la Plata , where he supported the revolutionary movements of May , being the only neighbor ( founding fathers of Argentina ) of Italian origin who attended in the Open Cabildo , of May 22 , 1810 . 
<triplet> May 22, 1810 <subj> Open Cabildo <obj> depicts