A notoriously jealous Augustus ordered that a banner always be carried in front of him proclaiming that he had never suffered defeat in response to this man's brilliance at Actium.  
Only Augustus and Valerius Corvinus had held the consulship at a younger age than this man, and no one had been awarded a triumph younger than when he received one in 38 BCE.  He first gained recognition for putting down an Aquitallian uprising in Gaul.  A notoriously jealous Augustus ordered that a banner always be carried in front of him proclaiming that he had never suffered defeat in response to this man's brilliance at Actium.  The progenitor of three Roman emperors and effectively co-ruler with Augustus until his death in 12 BCE, FTP, name this builder of the Pantheon.
Only Augustus and Valerius Corvinus had held the consulship at a younger age than this man, and no one had been awarded a triumph younger than when he received one in 38 BCE.  
Marcus Vipsanius Agrippa