Giovanni Mario Alessandri was an Italian Hispanist and grammarian from the 16th century.
He spent a time at the Spanish royal court and he wrote the first Spanish grammar for Italians, Il Paragone della Lingua Toscana et Castigliana (Nápoles: Mattia Cancer, 1560).
This work was inspirational for Giovanni Miranda's Osservationi de la lingua castigliana.
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