I’ll just leave this here:
“In the first half of the fifteenth century Cardinal Branda da Castiglione, who died in 1448, was legate in Milan. As part of his plan for reconciling Philip Mary Visconti, Duke of Milan, and the Holy See, he endeavoured to substitute the Roman Rite for the Ambrosian. The result was a serious riot, and the Cardinal’s legateship came to an abrupt end.”
https://www.newadvent.org/cathen/01394a.htm
Thx.