In 2004, Andreini Angelo and his maestro Sante Pizzol (world- renowned artist) moved to Peru where they spent 43 days working with and teaching a group of 15 students, as part of the Mato Grosso Operation.
During their stay they created two impressive polychrome rose windows, (each 3 metres in diameter) depicting sacred images, destined for a church in Baltimore (USA).
They produced a stained glass panel (7×5 metres) portraying the Pentecost and another glass panel (15×15 metres) for the Cathedral of Pucallpa (Peru).