Beatrice Lascaris di Tenda was born between 1370 and 1376 as the daughter of Pietro Balbo II. On 2 September 1403, she married Facino Cane of Montferrat. When he died in 1412, she was left a very rich widow. He happened to die on the same day as Giovanni Maria Visconti, the 2nd Duke of Milan. He was succeeded by his brother, Filippo.
Filippo wished to marry Beatrice for her great fortune, which was much greater than his own. However, she was 20 years older than he was. They married anyway, but not surprisingly they never had children together. Despite her great wealth, Filippo soon grew tired of Beatrice. He accused her of adultery and Beatrice and two of her handmaidens were taken to the Castle of Binasco. Once there, the two handmaidens were tortured into confessing the non-existent adultery. Beatrice received 24 lashes but refused to admit to any adultery. Nevertheless, all three were declared guilty of adultery, or of being an accomplice and they were sentenced to death.
Beatrice was beheaded in the courtyard of the castle on 13 September 1418.
Her husband remarried in 1428 to Marie of Savoy, daughter of Count Amadeus VIII of Savoy and Mary of Burgundy, but they too had no children.