Giovannino de' Grassi (c.1350 - 6 July 1398) was an Italian architect, sculptor, painter and illuminator.
[1][2] He was born in Milan, Italy, in the 14th century, although the year of his birth is uncertain.
He is known have made illuminated manuscripts for the Visconti family of Milan.
He collaborated with the Lombard architect Giacomo de Campione.
de Grassi passed away in 1398.