Vicente Bacallar y Sanna, 1st Marquess of San Felipe, later italianized into Vincenzo Bacallar Sanna (Cagliari – Sardinia, island now belonging to Italy, 6 February 1669 – The Hague (Netherlands), 11 June 1726), was a Sardinian[1][2][3][4] nobleman, military officer, linguist, historian, politician and ambassador of the Spanish Empire.

During the war of the Spanish succession, when Sardinian aristocracy divided between Philip of Anjou (of the house of Bourbon) and Charles of Habsburg, Bacallar was loyal to the heir designated by Carles II, Philip of Anjou, who became king as Philip V. Due to his loyalty, the king awarded him as Marquess of San Felipe (Marqués de San Felipe, in Spanish; not a feudal title, but given in homage to the king's patron saint) and Viscount of Fuentehermosa (Fuente Hermosa de Miranda, fief in the kingdom of Navarre) in 1709.

Aftermath he was appointed as an envoy plenipotentiary at the republic of Genoa, from where he supported the attempt by cardinal Alberoni to re-conquer Sardinia to the Spanish crown.

He wrote the short poem Las Tobias (The Tobies, 1709), the poem El Palacio de Momo (Momo's Palace, 1714), the treaty Monarchia Hebrea (The Hebrew Monarchy, 1719) and historical works, such as Description geographique, historique et politique du royaume de Sardaigne (Geographical, historical and political description of the Kingdom of Sardinia).

In 1724 he was appointed as ambassador in the Netherlands, with the aim of convincing them to remain neutral, where he died two years after due to a stroke.