Bianca Pellegrini d'Arluno, or simply Blanchina, was an Italian noblewoman, famous for being the lover of the condottiere Pier Maria II de 'Rossi, Count of San Secondo.
It was probably the lady-in-waiting of the Duchess of Milan Bianca Maria Visconti and wife of the knight Melchiorre di Arluno, administrative officer of the powerful family of Francesco Sforza. At the court of the duke, where he formed culturally, around 1440, he met Pier Maria II de 'Rossi, who fell in love with her. Pier Maria returned to Parma and the young lady followed him.
Although married (1428) with Antonia Torelli, daughter of Guido, Count of Guastalla, Pier Maria built in the honor of Bianca, between 1448 and 1460, the castle of Torrechiara, which became the meeting place of the two lovers. He wanted the painter Benedetto Bembo to decorate his precious bedroom, the so-called Camera d'Oro, whose frescoes would perpetuate his feelings for Bianca. The Count of San Secondo also dedicated to his beloved the Rossi di Roccabianca fortress, built between 1446 and 1463, the winter residence of the lady. Pier Maria was widowed in 1468 by his wife Antonia, but it does not appear that he later married Bianca.
Between 1455 and 1471, the Rossi commissioned Francesco da Enzola to make some medals bearing his effigy and that of Pellegrini, important under the iconographic aspect, but today almost all of them were missing. The artist had worked for Federico da Montefeltro, Francesco Sforza, Taddeo Manfredi of Faenza, Cecco Ordelaffi di Forlì.
At the death of Bianca, in about 1480, at the age of 63, he was buried in the palatino oratory of San Nicodemo of the castle of Torrechiara where, two years later, in 1482, the sixty-nine-year-count was also buried.