The oldest surviving tarot cards are the 15 or so Visconti-Sforza tarot decks painted in the mid-15th century for the rulers of the Duchy of Milan. A lost tarot-like pack was commissioned by Duke Filippo Maria Visconti and described by Martiano da Tortona probably between 1418 and 1425, since the painter he mentions, Michelino da Besozzo, returned to Milan in 1418, while Martiano himself died in 1425. He described a 60-card deck with 16 cards having images of the Roman gods and suits depicting four kinds of birds. The 16 cards were regarded as "trumps" since in 1449 Jacopo Antonio Marcello recalled that the now deceased duke had invented a "novum quoddam et exquisitum triumphorum genus", or "a new and exquisite kind of triumphs". Other early decks that also showcased classical motifs include the Sola-Busca and Boiardo-Viti decks of the 1490s.