Riccardo Rognoni or Richardo Rogniono (ca. 1550) is the earliest known member of the Rognoni family which started one of the earliest of all violin schools, based in Milan.  His treatise Passaggi per potersi esercitare nel diminuire (“Passages for practice in diminution”), is the first to mention the violino da brazzo, or violin. He was directly involved in taking the violin from a street instrument to court. Some of his excellent violin pupils include his sons Francesco and Giovanni Domenico.