Alexis of Russia
Actually, he visited Paris, Venice, Istanbul, Warsaw (he attended there the enthronement of John III Sobieski), Vilna, Moscow (where he met Nicolae Milescu, who acted as Cubero's interpreter in the presence of tzar Alexis of Russia), Astrakhan, Isfahan, Qazvin (where he was received by Shah Suleiman of Persia), Bandar Abbass, Surat, Goa, Colombo, Mylapore, Malacca, Philippines, Moluccas, Acapulco, Veracruz, Havana and eventually Cádiz, among many other places.