In 1720, when he protested Pope Clement XI's decree that only members of the painter's guild, Accademia di San Luca, could teach drawing, and had the ruling got revoked.
When he protested Pope Clement XI's decree that only members of the painter's guild could teach drawing, and had the ruling got revoked. This was in 1720. The painter's guild was Accademia di San Luca.