The origins of the Mazzega glassworks date back to 1929 when Romano Mazzega established a small company in Murano under his own name.
- In 1937, he sold his company to Aureliano Toso, who renamed it Vetri Decorativi Rag. Aureliano Toso.
- In 1938, Romano Mazzega, together with his brother Gino and his sister Maria, founded a new glassworks called Fratelli Mazzega.
- After the Second World War, around 1950, Fratelli Mazzega was reorganized and renamed I.V.R. Mazzega.
- It collaborated with Fucina degli Angeli; this collaboration resulted in unique glass objects designed by artists such as Marc Chagall, Pablo Picasso, Georges Braque, Gio Ponti, and Jean Cocteau, and these pieces were signed "I.V.R. Mazzega" along with the artist's signature.
- Production at I.V.R. Mazzega ceased completely in 1983.
