Background
Born in Milan, son of Barnabò and Beltramola de" Grassi, Estorre in 1404 had received as its domain the Lordship of Martinengo and Morengo.
Born in Milan, son of Barnabò and Beltramola de" Grassi, Estorre in 1404 had received as its domain the Lordship of Martinengo and Morengo.
In 1407 he was proclaimed Lord of Monza and made a mint to mint its own coins with the words Hestor Vicecomes Modoetie. At the killing of Giovanni Maria Visconti (16 May 1412), Duke Estorre was acclaimed by the people of Milan, and remained so until June of that year. Here, in the courtyard of the castle, while he was watering his horse, a stone thrown at random from a catapult of the besiegers broke his leg causing death in Monza after a few days.
In 1711, following the work in the Duomo of Monza, his mummified body was found and is now preserved in the Museum.
His sword, a valuable work of the Milanese armourer, is exhibited in the Museum of the Treasure of the Cathedral of Monza.
He was a member of the Society of Braid, chivalric order founded Archduke Albert III of Austria.