He kept a steam-powered factory where he worked on grinding and toasting coffee beans under the `` Rio Branco '' brand , located on the spot where today stands the square called `` Praça Zacarias '' ( square located in the center of Curitiba ) .
He worked on grinding and toasting coffee beans under the `` Rio Branco '' brand there . It was located on the spot in the square where `` Praça Zacarias '' ( square located in the center of Curitiba ) is today .